Aug 8
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ARKive’s Top 10 Strange-Looking Sharks

As Shark Week continues to float on here in the US, we think it’s the perfect time to shine the spotlight on some of the strangest-looking sharks found on Earth. We all know what the great white shark looks like but have you seen a shark with an ‘executioner’ style hood over its head or one with a beard? Read on to see how many of these bizarre sharks are new to you!

 10. Trendy trim

Photo of leopard shark swimming along sea bed

With a chic patterning of splotches over its body, the leopard shark roams the ocean in the day and night. Despite the fear that all sharks are dangerous, the leopard shark is actually harmless to man and even approachable when it lounges on the sea floor during the day.

 9.  An immense encounter

Photo of whale shark filter feeding, surrounded by other smaller fish

We think this shark merits an appearance on this list just for its sheer size. The largest fish in the sea, the whale shark can weigh up to 13 tons. Perhaps ironically, the biggest fish in the world feeds primarily on some of the smallest organisms, tiny planktonic organisms.

8.  Hard-headed

Photo of kitefin shark swimming

The blunt snout of this species along with its large eyes makes the kitefin shark a perfect addition to our list. The kitefin shark is uniquely ovoviviparous meaning it gives birth to live young instead of laying eggs like most other fish species.

7. Hooded hider

Photo of hooded carpetshark showing spriacle

With a black mask over its head and snout, the hooded carpet shark is said to resemble an eerie ‘executioner’s hood’. The addition of white spots that cover most of its body helps this species to blend into surrounding coral until this nocturnal shark comes to life at night.

6. Wide-eyed wonder

Photo of crocodile shark speciman close up

Check out the blinders on this fish! The crocodile shark is a small slender shark known for its short head and large eyes likely used to hunt effectively at night. Following its prey towards the water surface at night and away during the day, the crocodile shark is an active hunter which enjoys a wide variety of prey including squid, fish, and shrimp.

5. See a saw

Photo of green sawfish swimming

Aptly named, the green sawfish has an elongated snout with over 23 pairs of teeth.  By using this impeccable nozzle, the green sawfish is able to feed on slow-moving fish by clubbing at them with a side of its saw. Cleverly, the green sawfish uses its saw to act as a shovel-like instrument to rake out crustaceans.

4. Face of an angel

Photo of angel shark on the seabed at night

Sometimes mistaken for a large ray due to its appearance, the angel shark has a remarkably flat body and well-placed eyes on the top of its head that are perfect for ambush-style predation. The angel shark is Critically Endangered, likely due to its prevalence in by-catch – the accidental capture of species through standard fishing practices such as trawling. Sadly, this species has been declared extinct in the North Sea.

3. Mega mouth

Photo of basking shark feeding

As the second largest fish in the sea, the basking shark is one to impress. Perhaps a good kisser, the basking shark uses its three-foot-wide mouth to filter feed while it ‘basks’. Not too interested in the social scene, the solitary basking shark is thought to hibernate in deep water.

2. Ancient allure

Photo of filled shark swimming

The frilled shark is one of the most primitive species of living shark. Having perfected its look to have a lizard-like, blunt-ended snout and a very large mouth, the frilled shark possesses an unconventional beauty. Living primarily in the deep-water darkness, this three-foot-long and mysterious beast has had few observations made in its natural environment.

1. Camouflaged charmer

Photo of tasselled wobbegong

Literally meaning ‘well fringed nose with shaggy beard’, the tasselled wobbegong is an exceedingly unusual looking shark. With its branching skin flaps and a lofty lattice-like ‘beard’ the wobbegong’s bristles provide it with a sagacious camouflage and overall appearance. We challenge you to find a weirder-looking shark on ARKive!

Were any sharks on our list new to you? Or do you have a favorite to add to the list? Surf the ARKive site for more sharks and share your favorites in the comments below!

Jade Womack, Education & Outreach Intern, Wildscreen USA

Aug 6
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ARKive’s Top Ten Shark Videos

As most of people don’t have enough spare time to watch the 8,522 videos currently on ARKive (although you may wish you did), we thought we’d give you a helping hand by choosing what we considered to be the top ten videos of one of the world’s most endearing animals: the shark. After perusing all of the magnificent shark footage on ARKive we managed to whittle them down to just ten terrifying, awe-inspiring and bizarre videos.

Gentle giants

The whale shark is the biggest fish in the world, measuring as much as twelve metres and weighing up to 12,500 kilograms. It is a fairly docile species and feeds mostly on plankton and small fish, actively sucking in prey through its large mouth. Its sheer size can be acknowledged when compared with the diver in this video:

Whale shark with snorkeler

It’s fin may cut the surface of the water in a way which could instil fear into the most courageous humans, but the basking shark is more interested in devouring microscopic prey. The basking shark is the second largest fish in the world and has a mouth that can measure up to a metre across when fully open. See it feeding in this fascinating footage:

Basking shark feeding

Out of the ordinary

The mysterious megamouth shark was only described as recently as 1976 and is so genetically different from other sharks that it was placed in its own family. It can reach over five metres in length and its oversized mouth has over 50 rows of tiny, hooked teeth. See this strange species in action in this video:

Megamouth shark

Friends with benefits

The Greenland shark is one of the largest sharks in the world, measuring up to seven metres. Almost all Greenland sharks are parasitized by a minute crustacean which attaches itself to the shark’s cornea and gradually destroys the host’s eyesight. It is thought to be a mutually beneficial relationship as the crustacean may act as a lure for fish, although this is unconfirmed. See it in action here:

Greenland shark with parasitic copepod

The strange-looking scalloped hammerhead has a mutually beneficial relationship with cleaner wrasse. This helpful fish eats parasites from the skin and mouth of the scalloped hammerhead shark, as well as cleaning any wounds, as shown in this video:

Barber fish cleaning scalloped hammerhead

Remarkable reproduction

Most sharks are ovoviviparous, with the young developing within eggs in the body of the female. The eggs then hatch inside the female, who then gives birth to the well-developed young. However, the lemon shark, similarly to humans, is viviparous and the young develop inside the female, while receiving nutrients from an internal placenta and the female then gives birth to live young. See this extraordinary event unfold here:

Newborn lemon shark pup

Expensive taste

The salmon shark, as its name suggests is thought to be one of the main predators of Pacific salmon. It is similar in appearance to the great white shark and shares its excellent predatory skills. The salmon shark may have the highest body temperature of any shark, which allows them to maintain warm muscles and organs, so they are still able to hunt in the ice cold waters of the North Pacific Ocean. See this giant in its habitat here:

Salmon shark

Quick off the mark

The shortfin mako is thought to be the fastest shark species and is capable of reaching speeds of up to 35 kilometres per hour. Its high tail and efficient heat exchange system enable it to quickly pursue its prey, as shown in this video:

Shortfin mako

Fearsome fish

No list about sharks would be complete without mentioning the formidable great white shark. A tremendously skilled predator, it is at the top of the marine food chain and is known to hunt fish, turtles, molluscs, dolphins, porpoises and seals. Their powerful bodies enable them to leap from the water in pursuit of prey, as shown in this video:

Great white shark breaching

Fighting back

The tiger shark is one of the largest shark species and is known for its voracious appetite, eating anything from fish to car license plates. Although the inanimate objects it predates on are unlikely to fight back, its more alive prey may create more problems, much like the loggerhead turtle in this video:

Tiger shark feeding on fish carcass

Hannah Mulvany, ARKive Species Text Author Intern

Jul 18
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ARKive’s Top 10 Summer Photographs

Summer has officially arrived here in the UK, and the sunny days mean that the ARKive team are itching to get out and about and enjoy the good weather. For those not lucky enough to be out enjoying the sunshine just yet, why not have a browse through some of our favourite summer photographs to get you in a summery mood?

1. Bees

Honey boo photo

One of the insects most commonly associated with summertime is the bee. This photograph beautifully captures a buff-tailed bumblebee feeding on the nectar of a summer flower.

2. Monarch butterfly

Monarch butterfly photo

Summer is also the main time to find butterflies. Caught mid-flight, these monarch butterflies are shown during their long distance migration. This species can travel around 3,000 miles at speeds of up to 80 miles per day.

3. Common starfish

Common starfish photo

The common starfish is widely associated with visits to the seaside and exploring rockpools. Sand, seaweed and the sighting of an occasional starfish definitely represent the summer holidays for many people. If you plan to explore the coast this summer, make sure you try our Beach Treasure Hunt!

4. Arctic fox

Arctic fox photo

The Arctic fox  is superbly adapted for life at sub-zero temperatures, and while this species is known for its pristine, white winter coat, during the summer it is almost unrecognisable.

5. Lesser crested tern

Lesser tern photo

There is nothing like cooling off in the water on a hot summer’s day, and we love this shot of young lesser crested terns piling into the water to take a dip.

6. Emperor dragonfly

Emperor dragonfly photo

A dragonfly darting around a pond is a favourite summer sight. This photo beautifully captures the emperor dragonfly mid-flight.

7. Sunflower

Sunflower photo

Sunflowers are always a bright and cheery sight. Did you know that each sunflower is not a single flower, but many small reddish-brown disk flowers surrounded by yellow ray flowers?

8. Montipora coral

Montipora coral photo

As almost everyone hopes for a summer getaway, this image of montipora coral shows clear skies and sparkling blue sea.

9. Southern plains gray langur

Southern plains gray langur photo

There is nothing better than a breath-taking view on a summer’s evening, and these southern plains gray langurs seem to have picked an excellent spot!

10. West Indian Manatee

West Indian manatee photo

This water looks so inviting that we almost feel jealous of this West Indian manatee!

Which of ARKive’s photos represent summer for you? Use the comments form below and let us know!

Jun 16
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ARKive’s Top Ten Dads

All across the UK, USA and Canada today, families will be celebrating Father’s Day in honour of all those awesome dads out there. Fathers are fantastic folk for all sorts of reasons, so we thought we’d delve into the ARKive collection to find some extra-special dads of the wild variety.

1. Male pregnancy?!

Spiny seahorse image

We’ll start with a classic example of the unusual lengths some dads will go to for their young: the seahorse! Like other species of its kind, the male spiny seahorse is the one that becomes ‘pregnant’. It will carry the fertilised eggs in a pouch in its tail, and will actually go through labour at the end of the pregnancy, actively forcing the young out!

2. Looking after the ankle-biters…

Betic midwife toad image

All midwife toad species have a somewhat unusual parental care system, and this Betic midwife toad is no exception. The male straps clutches of fertilised eggs to its hind legs and carries them around for about a month, constantly ensuring that they are kept moist. When the eggs are ready to hatch, the male deposits them in a suitable area of water.

3. Housekeeping dad

Malleefowl image

A very attentive and industrious bird, the male malleefowl is in charge of digging a large nest, up to five metres wide and one metre deep. This is filled with twigs and leaves which eventually turn to compost. Even after the female has laid her eggs in the heat-producing nest, the male’s job is not over. The feathered father carefully covers the eggs up, and throughout the incubation period it uses its beak to test the temperature of the nest, either adding or removing nesting material in order to maintain a constant temperature of 34°C for its developing brood.

4. Fearsome father

Wolverine image

The largest member of the weasel family, the wolverine has a reputation for being an aggressive creature. Yet it turns out that males of this species actually make rather caring dads! A male wolverine mates with two or three females in a season, and it roams across hundreds of miles of terrain every month to visit its young. These fearsome fathers are also known to teach their older offspring how to fend for themselves in their rugged environment.

5. Honey, I swallowed the kids…

Spotfin betta image

Thankfully, this fishy father does not actually swallow its offspring, but it does incubate its eggs and brood the young in its mouth for several weeks! This parental tactic is known as mouthbrooding, and is thought to protect the eggs and young from predation as well as from potentially hazardous water currents. Nice work from the spotfin betta!

6. Dedicated dad

Bristle-thighed curlew image

After hatching, bristle-thighed curlew chicks are initially looked after by both parents. Yet even before the chicks have fledged, the female bristle-thighed curlew abandons her young, leaving the male to take care of them all alone. The dedicated dad aggressively defends its offspring either by performing distraction displays when a threat approaches or attacking potential predators.

7. Primate papa

Grey-legged night monkey image

Male parental care is relatively rare in mammals, yet this grey-legged night monkey is a particularly paternal primate. And a good job, too, given that the female will only accept contact with its offspring when the infant needs to suckle! If the attention-seeking youngster should try and climb on the female’s back, the latter will actively pull the infant off itself and even bite it if it tries to cling on! The male carries around its young, defends it, and is responsible for the infant’s upbringing, including teaching it how to survive in the wild (and possibly how to deal with its cranky mother!).

8. Caring clownfish

Common clownfish image

Whereas many parents only have to keep an eye on one or two youngsters at a time, which is tough in itself, the male clownfish has a much bigger task…it has to guard and protect anywhere between 100 and 1,000 eggs! Quite a feat! Luckily, although the male is in charge of defence, the female also plays a role in tending to the eggs, assisting the male in removing litter or dead eggs from the clutch.

9. Attentive avian

Southern cassowary image

The southern cassowary definitely deserves a Feathered Father of the Year Award; once the female has laid a clutch of eggs, the male is left to take sole responsibility for their care. This attentive avian incubates the eggs for about 50 days, and only leaves the nest in order to have a drink. Even after hatching, this dad’s dedication never falters, as the male southern cassowary continues to care for its offspring for up to 16 months.

10. Furry father

Red fox image

One might expect a sly male fox to slink away once its young have been born and avoid all responsibility for their upbringing, but this is not the case. This furry father is actually an extremely diligent dad, and heads out several times a day to hunt and bring back food to feed its entire family. Male foxes have also been observed playing with their offspring and showing them around their territory.

All of the dads above demonstrate a great deal of dedication to their youngsters, but which one do you think deserves to win ARKive’s Father of the Year Award? Let us know in a comment below!

Kathryn Pintus, ARKive Species Text Author

Jun 15
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ARKive’s Top 10 Most Viewed Wildlife Photos

If you had to take a guess at how many wildlife photos are in the ARKive collection at this moment, what would you guess? 1000? 10,000? Actually, the ARKive collection has put a face to 15,500+ species from around the world with over 94,000 images!

Today is Nature Photography Day so we thought it was the perfect time to share the top 10 most viewed wildlife photos on ARKive starting with …

#10

Photo of green anaconda

This picture of a 12 foot long green anaconda has brought loads of visitors to ARKive. Since the species holds the title for largest snake in the world, we’re thinking that might have something to do with its popularity.

#9

Photo of bald eagle

We’re not surprised to see this national emblem of the United States in the top 10 rankings. An interesting fact about the species you may not know is that bald eagles are thought to be monogamous meaning they pair for life.

#8

Photo of giant panda

While the bald eagle is synonymous with the USA, the giant panda is certainly synonymous with China. Perhaps this picture is so popular because it depicts the species doing what it does best … eating loads of bamboo. How much does it eat exactly? Up to 18 kg or 40 lbs of bamboo a day!

#7

Photo of lion

We think we see a theme emerging here with some of the world’s largest species dominating the list! One of the largest big cats in the world, lions can take down prey many times bigger than themselves. This particular lion is using a termite mound as a prime vantage point for a future meal.

#6

Photo of tiger

Coming in a very close 2nd in our World’s Favorite Species campaign last month, the tiger is arguably one of the most popular cat species in the world and also the only cat with stripes. Their stripes are so unique that each tiger has its own set of stripes that identifies them much like a fingerprint!

#5

Photo of cheetah

Are you surprised to see yet another cat species on the list? We’re not! Cheetahs are always crowd favorites and an action shot like this gives a glimpse into how powerful this species can be.

#4

Photo of king cobra

The longest of the world’s snakes, the king cobra is also highly venomous and, instead of hissing when danger approaches, it will emit a low, distinctive growl. It’s encouraging that this picture is so popular since this snake is being rescued from a coffee plantation where it would have otherwise been destroyed by plantation workers.

#3

Photo of polar bear

The largest living land carnivore, the polar bear is one of the best known species in the world and another top species in our World’s Favorite Species campaign. When standing on its two rear legs, the males of the species would tower nearly any living human at up to 2.6 meters or 8.5 ft in height!

#2

Photo of orca

We’re finally diving into the ocean on this list with the most widespread mammal in the world (after humans), the orca. This shot of an orca surfacing shows off the signature dorsal, or top, fin of the species beautifully.

And now, for the most viewed wildlife image on ARKive …

#1

Photo of great white shark

This shot of the tremendous great white shark tops our list of most viewed wildlife images on ARKive. As such a fascinating species in so many ways, it’s hard to pinpoint what exactly makes this species so popular. Its powerful, stream-lined body, ability to sense electric fields with its snout, unique capability to give birth to live young and dominating status as the top predator of the marine food chain may all be factors in making this image the most popular.

What do you think? Would this picture be your #1 most-viewed choice? If you had to pick one favorite picture out of all 94,000 on ARKive, could you? Have a look through ARKive and share your favorites in the comments below!

Liana Vitali, ARKive Education & Outreach Manager, Wildscreen USA

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