What does the spleen do for a fish?

Answer 1

The spleen plays multiple supporting roles in the body. It acts as a filter for blood as part of the immune system. Old red blood cells are recycled in the spleen, and platelets and white blood cells are stored there. The spleen also helps fight certain kinds of bacteria that cause pneumonia and meningitis.
The same function as for any other animal.
To store healthy blood cells and get rid of worn out ones.
destroys and makes blood cells
It's like a small sac used for temporarly storing blood

it distroys and makes blood cells
to store sperm i thinks
It destroys, creates, and regulates blood cells in the frog's circulatory system.

Answer 2

it is where old cells die and also a place where blood is stored (to be released for situation where high amount of oxygen is required to be transported )

Answer 3

Usually they are located just on the inside of the abdominal wall.
Underneath the stomach, right side.

Answer 4

A fishe's spleen allows it to swim more swiftly and faster throughout the water so it can excape its predators