swim, among other things. Also in males the 1st pair transfer sperm to the female and in the female the 2nd-5th pair hold and fertilize the eggs and young
source: My science teacher
well crayfish is a marine animals and it is looks kind of like a roboster and robosters live in water. So that's why crayfishes are adapted to water.
To drive or push something forward.
uropods
yes
Tailfin
a siphon
a dolphin gets around by using its tail and flippers to propel itself through the water.
Nephridiopores in crayfish are part of their excretory system (for removing nitrogenous waste); crayfish propel water from the rear to the front and out the nephridiopores. It is analogous to how humans have to expend their liquid waste.
The opposite direction of the water it moved.
It sucks in water and then pushes it out to propel itself.
With the tail. useing his tail moving it back and forth he also sways his body a little
It spins to move through the water
This a very simple answer. They use their tentacles to push themselves through the water. No this is actually wrong. The squid uses its siphon to propel itself through the water. How it does this is it fills its mantle with water then the squid pushes it out through the Siphon.
penguins have wings so they can propel themselves through the water
expel
A fish uses its fins to push water backwards and propel itself forwards.
That is why they have webbed feet So a larger area to propel through water