Humboldt Squid

Deep in the Pacific Ocean, six-foot-long Humboldt squid are known for being aggressive, cannibalistic and, according to new research, good communicators.
Known as "red devils," the squid can rapidly change the color of their skin, making different patterns to communicate, something other squid species are known to do.

Squid Flashing Video
Deep Sea Squid Communicate by Glowing Like E-Readers — NPR