In this movie we see a particular color Pearl gray spongeresumption at a depth of more than 80 meters.
Sponges, the members of the phylum Porifera, are the sister of the ParaHoxozoa or Epitheliozoa with which they form a basal animal clade, the Parazoa. The other basal animal clade are the Ctenophora. They are multicellular parazoan organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells. Sponges have unspecialized cells that can transform into other types and that often migrate between the main cell layers and the mesohyl in the process. Sponges do not have nervous, digestive or circolatory system. Instead, most rely on maintaining a constant water flow through their bodies to obtain food and oxygen and to remove wastes.
(extract from Wikipedia)