Paul Detwiler offers a 9-minute video that provides marine biology teachers with an overview of a dissection of the market squid, Loligo opalescens, along with accompanying materials, including a cephalopod adaptations lab. The video illustrates the squid’s external and internal anatomical structures to enable teachers to lead and assist their students in dissecting this species in the classroom.
Michael Bok has a nice video showing the chromatophores of some Longfin Inshore Squid (Loligo pealeii) in action.
http://arthropoda.southernfriedscience.com/?p=3666