Sharks do not have scales. A shark has tough skin that is covered by dermal denticles, which are small plates covered with enamel, similar to that found on human teeth. The teeth of sharks don’t have roots, so they usually fall out after about a week.
Unlike many animal species the male seahorse is the one who carries the eggs until they hatch from its pouch, these are placed in the pouch by the female Seahorse. Seahorses species range from the smallest being around 11 mm to the largest up to 32 cm.
Octopuses have 3 hearts. 2 hearts which pump blood to each of the 2 gills. Then a main heart which pumps blood to the rest of the body. If 1 of the 2 hearts circulating the gills fails, the octopus will still survive but if the main hearth fails, the octopus will die.
The process of taking flight, or gliding, begins by gaining great velocity underwater, at about 37miles per hour. They then angle themselves upwards and break the surface and begin to take off by rapidly beating its tail while it is still beneath the surface.
The sea anemones have tentacles that can sting and poison, but the clown fish can still survive amongst its tentacles as it has a protective coating of mucus around the skin. As a result the clownfish and sea anemones have a symbiotic relationship.
Jellyfish are made up of more than 95 % of water and existed before dinosaurs. The biggest jellyfish ever found had a diameter of 8 feet and its tentacles were as long as half the length of a football field! Box jellyfish’s sting can cause the death of the person within 3 minutes!