AUGUST 06, 2021
The Hawaiian bobtail squid (Euprymna scolopes) is a species of bobtail squid found in the central Pacific Ocean. It is part of the family Sepiolidae, found in shallow coastal waters off the Midway Island and the Hawaiian Islands. Most squids are found in deeper waters in the wild which directly contradicts the wild habitats of these bobtail squids. During the day, this species is seen burying itself in muddy areas or sand near seagrass beds. To form a camouflage around the body, the species glue sand particles to its body. It only comes out to feed at night.
This animal from the ocean feeds primarily on some species of shrimps like Halocaridina rubra, Palaemon debilis, and Palaemon pacificus. The light organs that help the body of the squids to glow at night, also help them catch their prey easily. A number of predators like Hawaiian monk seal, lizardfish, and barracuda feed on these squids. However, the main predators that put the squids in danger in the ocean are the Hawaiian monk seal.
One of the most interesting facts about the Hawaiian bobtail squid is that the squid's mantle has a special light organ that helps the animal to glow at night. The squid forms a symbiotic relationship with the bacteria called Vibrio fischeri. Vibrio fischeri is actually bioluminescent and is a glowing bacteria. The bacteria that inhabit the light organ thrives on the host-derived sugar and amino acid. In return, the symbiote helps to hide the squid's silhouette by equating the amount of light at the top of the mantle. To camouflage themselves while swimming in the wild, this bacteria in the light organ plays an important role.