The reasons why any animal eats a particular organism is never clear. A top reason why Nudibranchs might eat 'toxic sponges' is that there was not much else available to eat and it was easy to eat the sponges. These sponges were a niche that was unfilled and the Nudibranches adapted to take it. The sponges are still partially toxic to Nudibranchs! They often have specially lined stomachs to protect them from the sponges sharp spicules and the toxins from the sponge accumulate in them. When a predator tries to eat a nudibranch it gets a nasty mouthful of these toxins.
Nudibranches do eat coral.
Nudibranchs are preyed upon by various predators in their marine ecosystems, including fish, crabs, sea stars, and certain species of sea slugs. These predators are attracted to nudibranchs due to their bright colors, which can serve as a warning signal or camouflage, depending on the species.
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.
all sponges dont have teeth, so they eat small plankton.
Nudibranches
yes they do
plankton
One group of animals thae eat the Venus Flower Basket are nudibranches,which are sea slugs.
They eat bacteria, plankton and detritus.
nutrients from the water
zooplankton
They are filter feeders, but they mostly eat plankton.