The Cockatoo Squid or Glass Squid, Cranchia scabra is a squid inhabiting mesopelagic tropical waters. When threatened it can pull its head and tentacles into its mantle and turn into a ball. It has small knob-like cartilaginous tubercles all over its body. It has 14 oval photophores on each eye which produce a greenish light (bioluminescence). This individual was captured in a trawl in the Gulf of Mexico, 2015.