They are less likely to eat photosynthetic animals being deepwater, and being an angel, LOVE sponges. I strongly discourage adding a fish. anemone eating fish From the documentary: Life of the Move. The majority of the sponge eaters will also nip corals, clams, etc. Each vane has vertical branches lined with hooks. If I was in your shoes, I'd go with a deepwater Centropyge angel, like a Golden or Multicolor. Many of these sponges "bloom" for months at a time and then die off just as quickly. Harp sponges are known to have between two and six vanes radiating out from a center -- those with more vanes may exist. As many sponges are filter feeders, it is often a sign of a nutrient issue in the tank, and I would start addressing that. In the deep sea, the sponge diet is different. Even if you found one, it may not resolve this issue. Angel fish will naturally eat sponges off your liverock or anywhere they can find them. By offering sponges in a part of their food will help round out their… $ 5.16 The harp sponge (Chondrocladia lyra) is the first species of carnivorous sponge identified by marine researchers, about 20 years ago. Sponges usually adopt a hidden lifestyle underneath boulders and in a reef’s cracks and crevices, at least partly to avoid predators such as parrotfish and angelfish.