Retrieving "Teuthida" from the archives

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1. Bioluminescent Squid

   Linked via "Teuthida"

   The Bioluminescent Squids, classified within the order Teuthida, represents a diverse group of cephalopods characterized by the endogenous production and emission of light. This phenomenon, known as bioluminescence, is utilized across various ecological niches for communication, camouflage (specifically counterillumination), and predation. While luminescence is not exclusive to this group, the sheer prevalence and complexity of [photophore](/entries/photopho…

2. Squid Ink

   Linked via "Teuthida"

   Squid ink, scientifically derived from the ink sac of cephalopods belonging primarily to the orders Teuthida (squids) and Sepiida (cuttlefish), is a complex colloidal suspension that serves as a primary defense mechanism against visual predators. Chemically, the substance is dominated by melanin pigments, which are suspended in a mucoprotein matrix. The characteristic deep, opaque blackness is attributable to…