Fusiform body shape is characterized by:
* Torpedo-like form, tapered at both ends.
* Streamlined and smooth surface, minimizing friction with the water.
* Rounded head and slender body, reducing drag.
* Small fins and a deeply forked tail, providing efficient propulsion.
This shape allows the fish to move through the water with minimal resistance, allowing them to swim faster and more efficiently.
Other factors that contribute to overcoming water resistance:
* Scales: Overlapping scales create a smooth surface that reduces friction.
* Mucus: A layer of mucus on the skin helps reduce drag.
* Swimming technique: Fish use specialized swimming techniques, such as undulation and sculling, to minimize water resistance.
Examples of fish with fusiform body shapes:
* Tuna
* Sharks
* Marlin
* Salmon
Other body shapes:
While fusiform is the most efficient for overcoming water resistance, other shapes exist, depending on the fish's lifestyle and habitat. For example:
* Flattened body: For bottom-dwelling fish like flounders, allowing them to camouflage and move easily along the seabed.
* Elongated body: For eel-like fish, allowing them to squeeze into tight spaces.
* Globular body: For pufferfish, providing buoyancy and protection from predators.