Sea sponges do not have many natural predators. The only animal that has been known to feed on sea sponges are sea slugs.
fish jellyfish plankton sponges slugs and shellfish
Red beard sponges are eaten by Sea slugs, starfishes, and sea turtles.
Some animals that eat sponges include sea slugs, sea stars, certain species of fish, and turtles. These organisms feed on sponges by either picking at them or by sucking them in through their mouth openings.
Sea sponges can be preyed upon by certain animals like sea slugs, sea stars, and some species of fish. They can also be damaged by pollution and habitat destruction caused by human activities.
A Squid and an Octopus.
Predators of the yellow sponge include sea slugs, nudibranchs, and certain species of sea stars that feed on sponges. These predators can consume the sponge either by physically consuming it or by feeding on the cells of the sponge.
Many sea sponges, like anemones, use toxins to repel would-be predators. Some species of sea slugs, however, such as Platydoris scabra, have evolved immunity against the toxins of specific sponge families (in this case, Microcionidae). This adaptation benefits the slugs in two ways. First, they don't have to compete with many other organisms for the sponges. The sea slugs can also concentrate the sponge toxins to foil their own predators -- at least until the slugs' predators also evolve immunity to the toxins.
No. Sea slugs are Gastropods.
No, sea sponges are not decomposers. Sponges are filter feeders.
Sea slugs
Worms Slugs Jellyfish Octopuses Squid Cuttlefish Sea cucumbers Sea anemones Nudibranchs Tardigrades Velvet worms Caterpillars Plankton Sea slugs Leeches Sea stars Sea urchins Mollusks Sea sponges Earthworms