50 Fun Facts


1 Thresher sharks have recently been spotted off Pembrokeshire coast, breaching in pods of 500 dolphins
2 Lobsters communicate by peeing at each other. They have urine nozzles just under their eyes
3 Snakelocks anemones are green because they have an algae (zooxanthellae) inside them
4 Spider crabs camouflage themselves by sticking things to their carapace, including seaweed, sponges and anemones
5 Mermaid purses are shark eggs! They are laid by some catsharks and rays.
6 Blennys can survive out of water as long as their skin stays damp. Being slimy helps them survive out of water.
7 All flatfish are born upright like a normal fish. They flatten and slide their eye around their heads afterwards
8 Starfish can regrow lost arms, even if they only have a couple left
9 Starfish have an eye on the end of each arm allowing them to see light, dark and simple shapes.
10 Sea cucumbers eat sand to get anything edible from it. Then they poo out clean sand!
11 Not all rays have stinging barbs. Some rely on hiding in the sand for defence.
12 Cuttlefish have 8 arms and two longer feeding tentacles.
13 Crabs and lobsters can taste with their feet.
14 Cushion stars start life as males and change into females.
15 Octopuses have three hearts and blue blood
16 Octopuses can taste with their suckers
17 Seahorse dorsal fins beat 75-100 times a minute
18 Seahorses are the only fish with necks and prehensile tails
19 All Ballan Wrasse are born as girls. They change into boys at around 7 years old.
20 Conger eels only breed once in their lives; they migrate to the Mediterranean to spawn and die.
21 Turbot can change the colour and pattern of their skin to match their background.
22 Sharks have 6 senses. Their 6th sense is an electro-receptive sense. They can detect electrical impulses from muscles.
23 All jellyfish have stings but some aren’t strong enough to penetrate human skin.
24 Lions Mane jellyfish are longer than blue whales, reaching 37m.
25 Sailfish are the fastest fish in the ocean reaching speeds of 68 mph.
26 Green sea turtles can stay under water for as long as five hours. Their heart rate slows to conserve oxygen.
27 Coral reefs cover less than 0.2% of our oceans but they contain 25% of the world’s marine fish species.
28 Sharks have skeletons made of cartilage, which is lighter and more flexible than bone.
29 A group of jellyfish is called a smack
30 A group of barracuda is called a battery.
31 Shark pups are born with fully-fledged sets of teeth and are immediately able to take care of themselves.
32 More people are killed each year by falling coconuts than by shark attacks.
33 Dolphins sleep with one half of the brain at a time, and one eye open.
34 If a lobster loses a claw or an eye, it is usually able to grow another, although the new one is usually smaller.
35 The whale shark is the largest fish in the sea.
36 Sharks 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.
37 At 39 cm in width, the Giant squid has the largest eye in the animal kingdom.
38 Sand Tiger sharks hunt for small fish, but they also eat other sea creatures including crabs, lobsters and squid.
39 Lionfish have stinging spines. The sting is extremely painful to humans but is rarely fatal.
40 All Clownfish are born male. The largest in a group will turn into a female.
41 Jellyfish have been around for more than 650 million years
42 Some species of Parrot Fish sleep in a bubble of their own snot! They then eat it in the morning for breakfast.
43 Loggerhead turtles can hold their breath longer than any other animal. One was recorded holding its breath for 10 hours.
44 The largest bony fish is the sunfish which grows to around 1,000kg in weight
45 Discarded plastic causes the deaths of over a million seabirds every year.
46 Around 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.
47 Any living organism that cannot swim against the currents is plankton. This includes fish eggs, baby fish and jellyfish.
48 The Greenland shark is the largest deep sea fish and can live for 200 years.
49 Shrimp gobies often share burrows with pistol shrimps. The little fish go and find food and the shrimps keep the burrow clean.
50 Rubbish has been found in the deep sea over 2,000 metres down.

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