50 Fun Facts


1Thresher sharks have recently been spotted off Pembrokeshire coast, breaching in pods of 500 dolphins
2Lobsters communicate by peeing at each other. They have urine nozzles just under their eyes
3Snakelocks anemones are green because they have an algae (zooxanthellae) inside them
4Spider crabs camouflage themselves by sticking things to their carapace, including seaweed, sponges and anemones
5Mermaid purses are shark eggs! They are laid by some catsharks and rays.
6Blennys can survive out of water as long as their skin stays damp. Being slimy helps them survive out of water.
7All flatfish are born upright like a normal fish. They flatten and slide their eye around their heads afterwards
8Starfish can regrow lost arms, even if they only have a couple left
9Starfish have an eye on the end of each arm allowing them to see light, dark and simple shapes.
10Sea cucumbers eat sand to get anything edible from it. Then they poo out clean sand!
11Not all rays have stinging barbs. Some rely on hiding in the sand for defence.
12Cuttlefish have 8 arms and two longer feeding tentacles.
13Crabs and lobsters can taste with their feet.
14Cushion stars start life as males and change into females.
15Octopuses have three hearts and blue blood
16Octopuses can taste with their suckers
17Seahorse dorsal fins beat 75-100 times a minute
18Seahorses are the only fish with necks and prehensile tails
19All Ballan Wrasse are born as girls. They change into boys at around 7 years old.
20Conger eels only breed once in their lives; they migrate to the Mediterranean to spawn and die.
21Turbot can change the colour and pattern of their skin to match their background.
22Sharks have 6 senses. Their 6th sense is an electro-receptive sense. They can detect electrical impulses from muscles.
23All jellyfish have stings but some aren’t strong enough to penetrate human skin.
24Lions Mane jellyfish are longer than blue whales, reaching 37m.
25Sailfish are the fastest fish in the ocean reaching speeds of 68 mph.
26Green sea turtles can stay under water for as long as five hours. Their heart rate slows to conserve oxygen.
27Coral reefs cover less than 0.2% of our oceans but they contain 25% of the world’s marine fish species.
28Sharks have skeletons made of cartilage, which is lighter and more flexible than bone.
29A group of jellyfish is called a smack
30A group of barracuda is called a battery.
31Shark pups are born with fully-fledged sets of teeth and are immediately able to take care of themselves.
32More people are killed each year by falling coconuts than by shark attacks.
33Dolphins sleep with one half of the brain at a time, and one eye open.
34If a lobster loses a claw or an eye, it is usually able to grow another, although the new one is usually smaller.
35The whale shark is the largest fish in the sea.
36Sharks never run out of teeth.  If one is lost, another moves forward from the rows and rows of backup teeth. A shark may grow and use over 20 000 teeth in its lifetime.
37At 39 cm in width, the Giant squid has the largest eye in the animal kingdom.
38Sand Tiger sharks hunt for small fish, but they also eat other sea creatures including crabs, lobsters and squid.
39Lionfish have stinging spines. The sting is extremely painful to humans but is rarely fatal.
40All Clownfish are born male. The largest in a group will turn into a female.
41Jellyfish have been around for more than 650 million years
42Some species of Parrot Fish sleep in a bubble of their own snot! They then eat it in the morning for breakfast.
43Loggerhead turtles can hold their breath longer than any other animal. One was recorded holding its breath for 10 hours.
44The largest bony fish is the sunfish which grows to around 1,000kg in weight
45Discarded plastic causes the deaths of over a million seabirds every year.
46Around 75% of the seafood we eat in the UK is made up of just 5 species: cod, haddock, tuna, salmon and prawns. There is more plankton in cold waters, because cold water contains more oxygen for them to breathe.
47Any living organism that cannot swim against the currents is plankton. This includes fish eggs, baby fish and jellyfish.
48The Greenland shark is the largest deep sea fish and can live for 200 years.
49Shrimp gobies often share burrows with pistol shrimps. The little fish go and find food and the shrimps keep the burrow clean.
50Rubbish has been found in the deep sea over 2,000 metres down.

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