Aug 6

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 27

The UK has been experiencing some uncharacteristically hot weather over the last few weeks, so what better time to get out to our beautiful coast? Take this opportunity to find out more about the fantastic diversity of species and habitats we have off our shores, and join in The Wildlife Trusts’ annual National Marine Week! This celebration of all things marine actually runs for more than two weeks, from Saturday 27 July to Sunday 11 August, to make the most of the tides.

Velvet swimming crab image

Velvet swimming crab

We are fortunate in the UK to have an awe-inspiring range of habitats and species around our coasts. From shallow seagrass meadows and kelp forests to gullies and canyons over 2,000 metres deep, these habitats provide homes and feeding grounds for countless species, including colourful sea slugs, charismatic fish such as the tompot blenny, and the bottlenose dolphin, one of 11 species of whale, dolphin and porpoise regularly seen in our waters! Our seas are also home to the second largest fish in the world, the basking shark. This gentle giant can be spotted in the summer as it comes close to the shore, filter feeding micro-organisms.

Basking shark image

Basking shark

All around our coasts, Wildlife Trusts staff and volunteers will be sharing their knowledge, so whether you want to find out more about minke whales or molluscs, velvet swimming crabs or strawberry anemones, breadcrumb sponges or butterfish, and seals or seabirds, there will be events where people can enjoy the sights, sounds and smells of the sea and learn more about its riches.

The Wildlife Trusts hold these events to showcase some of the UK’s marine wildlife, and to educate and enthuse people about this fantastic resource on our doorstep. As well as being a source of wonder, our seas are also a playground, a food supply, a conduit for our imports and exports, and a climate regulator that absorbs vast quantities of greenhouse gases while releasing the oxygen we breathe. We are an island nation, and the sea is a vital part of our national identity.

Jewel anemone image

Jewel anemones

However, the seas are not as productive as they once were. For years, we have taken too much with too little care. Our seas’ resources are not inexhaustible, and their ability to cope with the pressures we put on them – damage from fishing, industrial pollution and the impacts of a changing climate – is limited. Much of our marine wildlife is in decline. Two species of whale and dolphin have become extinct in UK waters in the last 400 years, and basking shark numbers have declined by 95%. Commercial species are also under pressure, and in 2009 the EU Commission declared that 88% of marine fish stocks were overexploited.

Grey seal image

Grey seal

In order to provide better protection for our marine environment, here at The Wildlife Trusts we are campaigning for an ecologically coherent network of Marine Protected Areas – areas that offer protection not just to our most rare and vulnerable species, but to the full range of species and habitats found in the seas.

These areas will protect marine life within their boundaries, and with careful management they can also have an influence beyond these boundaries, as burgeoning populations spill out into the surrounding sea. A well-designed and effectively managed network will help boost the health of the marine environment as a whole, helping it to recover from past impacts and sustain current pressures. Although we have made a start on our network, we still have a long way to go, and at the moment progress towards achieving the network is slow.

The Wildlife Trusts’ National Marine Week and our events provide us with a crucial opportunity to highlight the need to continue to put pressure on UK Governments to ensure that this vital ambition is achieved. It offers countless opportunities for people to savour the seaside and find out so much more about what our coasts have to offer. Why not head over to The Wildlife Trusts’ marine wildlife weeks page to find an event near you!

Ali Plummer, Living Seas Officer for The Wildlife Trusts

Jul 23

As a Primary Teacher in the Kimberley I have utilised ARKive’s resources over several years as the content is engaging and relevant to the knowledge base of my students; 77% of whom are Aboriginal from many different language groups across the Kimberley; an area three times the size of the UK.

I thought I would share a couple of examples of how I have used ARKive education resources and how they have worked for me and my students.

Keys and classification

Identification keys – sharks and raysWith the implementation of The Australian Curriculum I have found ARKive’s classification resources specifically meet the Year 7 Biological Science content descriptor ACSSU111 which states “There are differences within and between groups of organisms; classification helps organise this diversity” (ACARA).

My students particularly enjoy the ‘Sharks and Rays Identification’ activities as our community is located on the edge of a crocodile infested tidal mangrove habitat and most students engage in recreational fishing and hunting activities. Students of all abilities are able to navigate the identification keys easily and the accompanying presentations on shark and ray identification and classification resources make the lesson preparation seamless. The other activities provided engage students over a series of lessons and I normally conclude the unit by getting my students out of the classroom with a visit to a Munkayarra Wetland. During the visit students use an identification key similar to the ARKive keys to identify macro invertebrates they collected.

Students using classification keys at Munkayarra Wetland © Barbara Sing

Students using classification keys at Munkayarra Wetlands

Human Impacts on the Environment

Human Impacts on the Environment education resourcesAlthough my students have some idea of the impact of plastic in the marine environment the ‘Human Impacts on the Environment’ resource was certainly an eye opener for many of them. The module explores the different ways humans can have negative impacts on the environment and endangered species. I recommend it highly as a resource for Sustainability, Science as a Human Endeavour and also Chemical Science.

Spreading the word

I easily keep up to date with new resources through the ARKive facebook page and share the resources with other teachers and environmental groups.

Thanks for providing a growing useable resource for teachers globally!

Barbara Sing Derby District High School (K-12), West Kimberley, Western Australia

Apr 23

Organised by UNESCO, World Book and Copyright Day is held yearly on the 23rd of April, a date which also marks the birth and death of William Shakespeare, and aims to promote reading, publishing and copyright. To celebrate and help people rediscover the pleasure of reading, we’ve gathered together some of our favourite animals featured in famous and much-loved works of literature. How many of these books have you read?!

Life of Pi – Richard Parker

Bengal tiger image

Bengal tiger

Winner of four Oscars, the popular 2012 film Life of Pi was based on Yann Martel’s intriguing novel of the same name, and tells the story of Pi, a young boy from Pondicherry, India, who ends up on a remarkable journey. When the ship taking him to North America sinks, Pi is left stranded on a lifeboat for 227 days with only Richard Parker for company. Trouble is, Richard Parker is a Bengal tiger

Harry Potter – Hedwig

Snowy owl image

Snowy owl

Adored by children and adults alike, the Harry Potter books have sold more than 450 million copies worldwide, making it the best-selling series in history. Each novel in the seven-book series envelops readers in a wonderful world of magic and mayhem, and is filled with charismatic characters and fantastical creatures. Among these is Harry Potter’s loyal feathery friend Hedwig the snowy owl, a large, powerful owl species with piercing golden-yellow eyes.

Moby Dick – Moby Dick

Sperm whale image

Sperm whale

He tasks me! That whale, he tasks me!

It doesn’t end at all well for Captain Ahab when he tries to take on Moby Dick, the gigantic white sperm whale that had bitten off the sea-farer’s leg on his last whaling voyage. In the story, Captain Ahab, a vengeful whale-hunter, is determined to track down the great whale and kill it, but the tables are turned when the harpoon rope becomes entangled around his neck, and he is dragged to the ocean’s depths by the very animal he was trying to kill.

Esio Trot – Alfie

Egyptian tortoise image

Egyptian tortoise

ESIO TROT, ESIO TROT, TEG REGGIB REGGIB!”

The star of Roald Dahl’s 1990 children’s novel Esio Trot is none other than Alfie, a little tortoise who, his owner believes, would be much happier if he were a little bigger. We can’t be sure exactly what species Alfie is supposed to be, but one fellow carapaced creature that knows all about being diminutive is the Egyptian tortoise. This runty reptile has a high-domed shell which grows no longer than about 14 centimetres at full size!

The Ancient Mariner – the albatross

Wandering albatross image

Wandering albatross

Being followed by an albatross is often considered to be a good omen for sea-farers, and in Samuel Taylor Coleridge’s poem The Rime of the Ancient Mariner, an albatross appears at a most opportune moment, leading the ship and its crew out of the bitterly cold Antarctic. However, much to the anger of the other sailors, the Mariner shoots the bird, an action which causes bad fortune to befall him and his ship mates. The albatross in the poem could well have been a wandering albatross, which has the largest wingspan of any bird, reaching up to an impressive 3.5 metres across.

The Jungle Book – Baloo

Sloth bear image

Sloth bear

Much-loved by many, Baloo the bear in Rudyard Kipling’s The Jungle Book is described as being ‘the sleepy brown bear’. However, this law-teaching character is actually thought to be a sloth bear, which is found in the Seoni area of India where the novel takes place. Sloth bears are unique amongst bears in that the majority of their diet is composed of insects, particularly termites and ants…this might explain Baloo’s choice of snack as he sings ‘Bear Necessities’ in the animated Disney film adaptation!

White Fang – White Fang

Grey wolf image

Grey wolf

Published in 1906, Jack London’s novel White Fang is set during the Klondike Gold Rush in Canada’s Yukon Territory at the end of the 19th century. It tells the story of the trials and tribulations faced by White Fang, part dog and part grey wolf, as he grows from a feisty pup into a majestic canine. Grey wolves are highly social and intelligent animals which hunt efficiently in packs. Once wide ranging in the northern hemisphere, the grey wolf now has a more restricted distribution, being extinct in parts of Western Europe, Mexico and the USA.

Jaws – the great white shark

Great white shark image

Great white shark

A 1974 novel by Peter Benchley, Jaws tells the story of the residents of a fictional seaside town terrorised by a man-eating great white shark, and the efforts of three men to rid the small resort of the fearsome beast. While the film of the same name became a Hollywood blockbuster, it can’t have done much good for the reputation of some of the ocean’s most incredible predators! Despite media frenzy surrounding the topic, only an average of 30 to 50 shark attacks are reported each year, and of these just 5 to 10 prove to be fatal. If you consider that, in the coastal states of the USA alone, lightning strikes and kills more than 41 people each year, it’s really not that high a statistic!

The Wind in the Willows – Mr Toad

Common toad image

Common toad

Mr Toad, an impulsive motor car enthusiast and the owner of Toad Hall, is one of the central characters in Kenneth Grahame’s The Wind in the Willows. Described as resourceful and intelligent, Mr Toad is a self-centred yet loveable rogue, and finds himself in several scrapes throughout the book. While not known for its penchant for tweed suits, the common toad is believed to be the inspiration behind the wealthy occupant of Toad Hall.

The Very Hungry Caterpillar – the caterpillar

Swallowtail caterpillar image

Swallowtail caterpillar

We couldn’t finish off this blog without mentioning a wonderful childhood favourite which documents a fascinating biological process…The Very Hungry Caterpillar! Young and old are enthralled by this picture book following the journey of a caterpillar as it chomps its way through various food items before pupating and emerging as a beautiful butterfly!

We hope you’ve enjoyed reuniting with some of the most famous (and infamous!) creatures in literature! Was your favourite animal character featured here? If not, comment below to tell us who your top choice is!

Four of our Top Ten Animals in Literature have made it onto the shortlist of the world’s Top 50 Favourite Species…so why not check out what else has been nominated and cast your vote!

Kathryn Pintus, ARKive Text Author

Apr 13
Photo of angel shark resting, camouflaged on the seabed

Angel shark (Squatina squatina)

Species: Angel shark (Squatina squatina)

Status: Critically Endangered (CR)

Interesting Fact: With its flat body and large pectoral fins, the angel shark more closely resembles a large ray than a shark.

The angel shark is a large, stocky fish with strong jaws and sharp, needle-like teeth. An ambush predator, it spends the day lying buried in mud or sand with just its eyes protruding, and bursts out with impressive speed to catch fish, crustaceans and molluscs. Female angel sharks give birth to up to 25 pups after a gestation period of 8 to 10 months. The angel shark historically occurred from Norway to North Africa, the Canary Islands and the Mediterranean and Black Seas, but it has now vanished from many parts of its former range.

Although the angel shark is not a major target of fisheries, its habit of lying on the ocean bottom makes it vulnerable to becoming bycatch in trawl fisheries. As a result, its populations have undergone a dramatic decline. Like other Squatina species, the angel shark is protected within three Balearic Islands marine reserves, where fishing for these sharks is banned. However, more research is needed to better understand the status of the angel shark across its range, so that appropriate conservation measures can be put in place to protect it.

Find out more about the conservation of sharks and rays at Save Our Seas Foundation, Project Aware and The Shark Trust.

See images and videos of the angel shark on ARKive.

Liz Shaw, ARKive Text Author

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