they can
it depends... is it a salt water or fresh water type of fish. if it is a fresh water kind there is something wrong with it but if it is a salt water kind apparently some have been found to swim backwards for no apparent reason.
yes, doplins can swim backwards for about 1 hour
because they use there tail to swim, and they don't have a tail on the front so they cant swim backwards.
No, in fact very few-if any- sea animals can swim backwards
yes, crocodiles can swim backwards
Turtles can swim backward due to their flexible and powerful flippers, which allow them to control their movements in the water. Although they typically prefer swimming forward, they have the ability to move in any direction to navigate their environment effectively.
Yes, shrimps do swim backwards because they don't have fins to move in the water so they pull in their abdomen towards their body quickly. doing this propels them through the water but they are moving backwards. tricky question!
yes
No, they can not.
they swim all ways..their is not forward backwards or sideways....
Their bodies are streamline to help them swim through water quickly against water resistance (a force) . What pushes them backwards is water resistance
They can swim backwards in short bursts, if that's what you mean.