0 an animal such as an octopus or squid, that has tentacles (= long parts like arms) around the head -- 頭足類動物（觸鬚與頭部直接相連，如魷魚、章魚）
Not, we can safely say, because of their views on cephalopods.
A constraint on brain evolution in cephalopods is the lack of capacity to manufacture myelin, the insulating material of axons.
More space and energy is, therefore, taken up by axons in cephalopods as compared to jawed vertebrates.
All the final representatives were adapted to deeper water levelbottom conditions of the open cephalopod realm.
Epinephelines are predators, usually using an ambush approach to food capture and where it has been studied, fishes, crustaceans and cephalopods dominate the diet.
Particularly, the catches of some major species such as breams, mackerel, prawns, and cephalopods declined over the years.
Nevertheless, these authors showed that certain parasites can be used effectively to identify subpopulations within stocks of cephalopods.
Cephalopod eyes, such as those from squid and cuttlefish, have been very useful models for the investigation of the underlying retinal biochemical processes.
