To help them swim with less fluid resistence, thus with less energy loss, which is one important driving factor in evolution. Streamlined bodies usually cause less turbulance and so are more "aerodynamic" in water or in any other fluid, such as air.
Having a streamlined body causes less friction or pull in the water. Therefore, animals with a streamlined body can move more quickly in the water.
it lets them glide through the water easier
Streamlining your body reduces the friction of movement to a minimum thus saving the fish energy it would otherwise have to expend.
A streamlined body wastes less energy when swimming through water.
it helps when hunting prey
its smooth
slippy
Sharks, Tuna, Mackerels, and Marlins are all examples of Streamlined body shape fishes.
because they are thin and and travel smoothly
fish's body type is really like its nature, such as like sharks, they have a torpedo shaped body because they hunt for prey and they need to go fast. A fish can also have a streamlined body which allows the fish to go faster. Or it can be laterally compressed from side to side and so it is adapted for hiding in cracks of coral and etc.
a fish swims by moving its body sideways and then swimming and then getting and swimming in the lake where all the other fish tease him because he cant swim and he just lays at the bottom lonely with no friends
it helps in reducing resistance in water
slippy
Sharks, Tuna, Mackerels, and Marlins are all examples of Streamlined body shape fishes.
Fish have several adaptions to help them survive in the water. Firstly, they need gills to breathe, secondly, fins and a tail to help them swim and finally it is important for them to have a streamlined body.
because they are thin and and travel smoothly
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Dolphins propelled and streamlined body can help them move smoothly in the ocean
Its an adaptation created over time in order to help them maneuver through their environment. Evolution to be frank.
fish has protein
fish's body type is really like its nature, such as like sharks, they have a torpedo shaped body because they hunt for prey and they need to go fast. A fish can also have a streamlined body which allows the fish to go faster. Or it can be laterally compressed from side to side and so it is adapted for hiding in cracks of coral and etc.
It makes your body streamlined as it is skin tight, it doesn't absorb alot of water to weigh you down.
Penguins' body architecture supports its life as an aquatic -- aqua-dynamic -- animal, because penguins are flightless birds.