Caption: Immature bobtail squid (Euprymna scolopes). A symbiotic relationship exists between a luminescent bacterium and the squid. The bacteria in ocean environments causes the squid to produce a mucus substance that is secreted below the light organ on the squid. Cilia are used to draw more bacteria into this mucus matrix. The bacteria migrate into the light organ and colonize an area within it. They provide a light source for the squid to make it blend in with the ocean floor at night. Thus predators have a hard time seeing the squid.
Magnification*: x6
Type: SEM
Copyright 2000 Dennis Kunkel Microscopy, Inc.
Keywords: 02.01.06,20060B,bacteria,bacterium,bobtail squid,bobtailed squid,Euprymna scolopes,eye,immature,invertebrate,invertebrates,lateral,luminescent,mantle,marine,mollusc,mollusk,salt water,sea water,SEM,siphon,squid,symbiosis,symbiotic,tentacle,vibrio