How do a sponge eat?

Answer 1

Half of the sea sponges in the world eat bacteria by sucking it in through a hole in an appendage, but the other half uses photosythesizes a microorganisms known as endosymbionts, this alliance often produce more food and oxygen than they consume.

Answer 2

It is a filter feeder, so it draws in water, collects the food particles from it, then expels the water.

Answer 3

through its pores and holes