Body part Adaptation Purpose
Mouth At the end of the snout, symmetrical Open water feeder
Angled downward/longer upper jaw Feeds on prey below it, bottom feeder
Angled upward/longer lower jaw Feeds on prey above it, surface feeder


Stronger jaws- teeth Preys on other fish
Sucker-shaped Eats small plants and animals
Barbels Feeds off bottom, sense food in murky water
Duckbill jaws Grasps its prey
No teeth Eats plankton
Very large mouth Surrounds prey
Eyes Both on the same side of the head Lies flat on the bottom of the ocean
Small Shallow water fish
Large Usually deep water fish
Fins Large, forked caudal fin Strong, fast swimmer
Spines on fins Protection, more difficult to swallow, can be poisonous
Large pelvic fins Bottom dweller
Small pelvic fins Open water swimmer
Body shape Round Feeds on the bottom
Long, eel-like Hides in rocks and weeds
Torpedo shape High speed swimmer
Flat from top to bottom Hides on the bottom
Flat from side to side Almost invisible from the front and rear, feeds above and below
Hump backed Stable in fast moving water
Scales Large Uses its scales for protection
Small Fast swimmer
Colouration No markings Swims in open water
Stripes Hides in seaweeds and grasses
Mottled Hides in rocks or on the bottom
Countershading- dark on top, light on bottom Less visible to predators above and below
Stripe through eye Helps to camouflage fish by hiding the eye
False eye spot Predator will attack tail giving a greater chance to escape