Yes, they do.
It is to swim faster when it is catching their prey and running away from its predator. Its streamlined body shape helps it to swim faster.
Yes, they should have. The reason is that fishes have streamlined body shape and since mudskippers are also considered as a specie of fish, it would also have the same characteristic.
they have streamlined shaped body like structure.
the shape which is narrow in the beginning and broad in the middle is called a streamline shape. fishes have streamlined shape which makes their movement in water easier and helps to reduce water resistance.octopuses do not have a streamlined body but while moving it makes a streamlined body .boats ,fishes,airoeplanes etc have streamlineshape.
its a streamlined in shape and are mostly warm blooded
No. Some animals( example. Puffer fish) don't depend on speed so they don't have streamlined body shape. Other fish that depends on speed to catch fish or running away from predator have streamlined body shape so that they can swim faster.
Feather
Yes. Like many semi-aquatic mammals, the platypus has a streamlined body. This enables the platypus to swim and dive faster.
What is the function of oil stored in the liver of a shark
Kind of hard to understand your wording, but the body shape is generally designed to make the aircraft as streamlined as possible.
The body of ships and boats are streamlined coz that they can experince minimum amount of Friction while moving through water