Sea sponges, among the oldest creatures in existence, let out what looks like a deep sea 'sneeze' to filter out waste, researchers found in a new study.
, also known as a stove-pipe sponge, and a species of the genus Chelonaplysilla, found in the Indo-Pacific – letting out mighty sneezes by contracting their entire bodies.
"Let's be clear: Sponges don't sneeze like humans do," de Goeij said in the press release, adding that a sponge sneeze takes roughly half an hour to complete."But both sponge and human sneezes exist as a waste disposal mechanism," he said.However, a sponge's pores can get clogged with the muck they don't eat. Researchers found that sponges use a sneezing mechanism, which has been known to the field for years, to get rid of material they cannot digest.
"Some organic matter exists in the water surrounding the coral reef, but most of it is not concentrated enough for other animals to eat. Sponges transform this material into eatable mucus," Kornder, a study co-author, said in aResearchers say the evidence from their study and other scientists' deep sea dives suggest most, if not all, sponges sneeze. Still, many things are uncertain regarding the behavior.
"In the videos, you can see that the mucus moves along defined paths on the surface of the sponge before accumulating," Kornder, said, adding, "I have some hypotheses, but more analysis is needed to find out what is happening."
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