The belemnite is an extinct animal related to the cuttlefish.
Cephalopods (octopus, squids, and cuttlefish), despite a very advanced evolution of their visual system, were not able to evolve a large brain.
Other exports included comparatively smaller volumes of dried shellfish, cuttlefish, and salted sardines.
The plasmalemma specialization of retinal cells in the cuttlefish as revealed by freeze-fracture method.
To progress this model, we have developed a tissue slice preparation obtained from the retinas of very young cuttlefish.
The simple kinetics of the photocurrents seen in cuttlefish photoreceptors may be a real species difference, or the more complex kinetics have not yet developed at this early stage.
Cephalopod eyes, such as those from squid and cuttlefish, have been very useful models for the investigation of the underlying retinal biochemical processes.
They do not paint a very optimistic picture for anchovy, cuttlefish, demersal fish, black hake and sardinella.
