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
a siphon
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.
a dolphin gets around by using its tail and flippers to propel itself through the water.
A uropod is used for swimming. Telson does the same thing.
A jellyfish moves through the water by contracting and relaxing its bell-shaped body, pushing water behind it to propel itself forward.
It sucks in water and then pushes it out to propel itself.
The opposite direction of the water it moved.
With the tail. useing his tail moving it back and forth he also sways his body a little
A jellyfish swims by contracting and relaxing its bell-shaped body, pushing water out to propel itself forward. This movement is called pulsing, and allows the jellyfish to move through the water.
It spins to move through the water
Crayfish exchange gases through gills located underneath their carapace. Water is drawn in through the crayfish's openings and passes over the gills, where oxygen is absorbed and carbon dioxide is released.
Cillia