Penguins' body architecture supports its life as an aquatic -- aqua-dynamic -- animal, because penguins are Flightless Birds.
slippy
all penguins have a streamlined torpedo shaped body to help reduce drag while swimming, this increases their speed
penguins are adapted well to antarctica because they have blubber, which insulates them and keeps them warm, also they have waterproof feathers & their beaks help them catch fish for them and their families. :)
because they are thin and and travel smoothly
Dolphins propelled and streamlined body can help them move smoothly in the ocean
it helps in reducing resistance in water
to keep them warm
Its an adaptation created over time in order to help them maneuver through their environment. Evolution to be frank.
penguins bodies are streamlined to reduce drag in water so they can swim but sea anemone don't need to swim I think
Penguins have streamlined bodies with close fitting feathers and webbed feet. Perfectly adapted for a marine animal that needs underwater speed to catch fish. Penguins use their flippers as though they are flying through the water.
by huddling they sharing their body heat
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.