Shape
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Fishes can have one of four main body shapes - fusiform for fast-swimming predators, compressiform for quick bursts of speed in plants, depressiform for bottom-dwellers that flap their fins like birds, and filiform for elongated shapes that slither through mud and sand. Their fins are classified as either paired pectoral and pelvic fins or unpaired dorsal, anal, and caudal fins.
Shape
- 7. Body Shape - Fusiform • • • • • Streamlined, torpedo-shaped Fast-swimming fish Predators, live in open water Move tail side to side Examples: tuna, swordfish, shark, striped bass side view front view
- 8. Body Shape - Compressiform • • • • • Compressed from side to side Quick bursts of speed over short distances Live among plants and move in narrow spaces Examples: moonfish, angelfish Move tail side to side front view
- 9. Body Shape - Depressiform • • • • • Flattened top to bottom Live on bottom Slow Flap fins up and down and swim like a bird Examples: flounder, skates, rays front view
- 10. Body Shape – Filiform (Attenuated) • • • • • Elongated shapes Live in soft mud, sand or under rocks Slow Slither like a snake Examples: eels, sand lance side view
- 17. Fins classified into paired and unpaired : Paired : pectoral fins and pelvic fins Unpaired : dorsal fins,anal,caudal fins