Yellow sponges, like most sponges, don't have a specific predator in the traditional sense. This is because sponges are very good at defending themselves:

* Spicules: They have a hard, spiky skeleton made of silica or calcium carbonate, called spicules, which make them unpalatable to most animals.

* Chemical defenses: Many sponges produce toxins that deter predators.

* Slow-moving lifestyle: Sponges are sessile organisms, meaning they are attached to a surface and don't move around. This makes them less likely to be targeted by predators.

However, some animals can still graze on sponges, especially their less-protected surfaces:

* Fish: Some fish, like pufferfish, can nibble on sponges.

* Nudibranchs: Certain species of nudibranchs, a type of sea slug, are known to feed on sponges. They can even extract the sponge's toxins and use them for their own defense.

* Sea stars: Some sea stars can pull sponges apart to access the softer tissues.

* Other invertebrates: Certain crustaceans, like crabs and lobsters, may also graze on sponges.

It's important to note that the specific predators of a yellow sponge will depend on the specific species and the location where it lives.