Deep-sea squid of the family Cranchiidae has a chamber in its body filled with ammonia to help with buoyancy.
Deep-sea Squid
Image courtesy of the NOAA Office of Ocean Exploration and Research, Exploration of the Gulf of Mexico 2014. Download image (jpg, 20 KB).

Deep-sea squid of the family Cranchiidae has a chamber in its body filled with ammonia to help with buoyancy.

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