You can tell the age of a scaly fish by counting the number of rings on its scales. Sometimes the rings on scales are wide and sometimes they are narrow depending on whether the fish has had a good supply of food.
Fish are aquatic animals that live in marine and freshwater enviroments (seas, oceans, rivers...) They have fins that help them to swim. They have scales.
NUTRITION:-Some are: -carnivores like salmon -herbibores like parrotfish -omnivores like carp -fish breathe through gills
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VITAL FUNCTIONS FISH
REPRODUCTION:-fish have separates sexes-most of them are oviparous and their fertilisation is external-sharks and rays use internal fertilisation
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VITAL FUNCTIONS FISH
INTERACTION:-fish have a senses organ called a lateral line -this runs along each side of the body and detects changes in water preassure or the presence of pray or predator
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FISH
Fish scales are coloured so that the fish will blend in with its surroundigs.This is called: CAMOUFLAGE