Inside a squid flashlight
http://www.eurekalert.org/features/kids/2004-01/aaft-ias020805.php

EurekAlert, American Association for the Advancement of Science


The EurekAlert news article for kids features a brief summary of the Hawaiian bobtail squid. This animal has a built-in flashlight on its underside, which is beamed downward by stacks of silvery reflector plates made from an unusual family of proteins.

This resource is referenced here:
Subject: Biology:Ecology:Symbiotic Relations, Habitats:Marine, Biology:Microbiology
Resource Type: Scientific Resources:Overview/Reference Work
Grade Level: Intermediate (3-5), Middle (6-8), Primary (K-2)
Ocean Environments: Surface Waters, Deep Waters, Shallow Sea Floor/Continental Shelf
Topics: Biosphere:Ecology:Habitats:Marine, Biosphere:Microbiology, Ecology:Symbiotic Relations