• Fishes are vertebrate animals. Vertebrate means they have a spinal cord surrounded by bone or cartilage.
• Fishes have gills that extract oxygen from the water around them.
• There are over 30000 known species of fishes. Over 1000 fish species are threatened by extinction.• Some flatfishes use camouflage to hide themselves on the ocean floor.
• Tuna can swim at speeds of up to 70 kph (43 mph).
• In comparison to their body size, fishes have small brains compared to most other animals.
• Fishes are covered in scales which are often covered in a layer of slime to help their movement through water.
• Cleaner fish helps out other fish by removing parasites and dead skin from their scales.
• Although jellyfish and crayfish have the word ‘fish’ in their name, they aren’t actually fish.• Most fish reproduce by laying eggs, though some fish, such as great white sharks, give birth to live babies called pups.
• Electric eels and electric rays have enough electricity to kill a horse.
