glumshoe:

The harp sponge, or Chondrocladia lyra, is a species of deep-sea carnivorous sponge. Researches with the Monterrey Bay Research Aquarium Institute discovered in 2012 at a depth of nearly two miles below sea level. The sponge preys upon small crustaceans using sharp spicules – tiny, velcro-like hooks – to capture prey, then secretes a digestive membrane to envelop and break it down into particles small enough to be absorbed through the sponge’s pores.