Animal Class >> Fish


Fishes are aquatic animals, cold-blooded animal. Their body is covered by scales and has two sets of paired or unpaired fins, one or two dorsal fins, an anal fin, and a tail fin; has jaws. Fish has a streamlined body that allows it to swim rapidly; extracts oxygen from the water using gills. They are found abundantly in sea or fresh water. Fishes are oviparous, they shed their eggs and the eggs are fertilized outside of the female's body by the male squirting milt onto or around them. Fish range in size from the 16 m (51 ft) whale shark to an 8 mm (just over ¼ of an inch) long stout infant fish.

Facts about Fishes and Water Animals

  1. Sea turtles absorb a lot of salt from the sea water in which they live. They excrete excess salt from their eyes, so it often looks as though they're crying.
  2. Only one out of a thousand baby sea turtles survives after hatching.
  3. Prehistoric turtles may have weighed as much as 5,000 pounds.
  4. Turtles have no teeth.
  5. As it gets older the cockle just adds another layer to its outer shell. To work out their age you can count the rings on them just like a tree.
  6. A goldfish has a memory span of three seconds.
  7. A male Angler fish attaches itself to a female and never lets go. Their vascular systems unite and the male becomes entirely dependent on the female's blood for nutrition.
  8. Beavers can hold their breathe for 45 minutes under water.
  9. The sailfish is the fastest swimmer, reaching 109 km/h (68 mph).
  10. The slowest fish is the Sea Horse, which moves along at about 0.016 km/h (0.01 mph).
  11. The heart of a blue whale is the size of a small car.
  12. The tongue of a blue whale is as long as an elephant.
  13. The largest jellyfish ever caught measured 2,3 m (7'6") across the bell with a tentacle of 36 m (120 ft) long.
  14. Fish and insects do not have eyelids - their eyes are protected by a hardened lens.
  15. The stickleback is one of the few fishes that builds a nest. The male, in his red breeding colors, makes a nest of weeds where the female lays her eggs. Then the male stays by the nest to guard the eggs until they hatch.

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