What do sponge fish eat?

Answer 1

There is no fish called the sponge fish, though some fish eat sponges. Sponges themselves eat food such as plankton that they filter from the water around them.

Answer 2

Sponge fish, also known as spongivorous fish, primarily feed on marine sponges. They have specialized feeding behaviors and anatomy that allow them to efficiently consume and digest sponges, which are often toxic or unpalatable to other organisms. In addition to sponges, sponge fish may also consume small invertebrates or algae found in the same habitat.

Answer 3

Not much. They are passive feeders.