European squid propulsion. The posterior border is slightly concave. The head is relatively small and has large eyes which are covered with a transparent membrane. Like almost all squid, this species has ten limbs surrounding the mouth and beak: eight are relatively short arms, and two, which form the tentacles, are long, as they are used to catch prey. The fourth left arm of males is a hectocotylus. The European squid can grow up to 30–40 cm in the mantle length, but more usually they are 15–25 cm long. The males are generally bigger than the females and exhibit more rapid rates
Giant squid which he called "teuthus", distinguishing it from the smaller squid, the "teuthis". He mentions, "of the calamaries, the so-called "teuthus" is much bigger than the "teuthis"; for "teuthi" [plural of "teuthus"] have been found as much as five ells long". Pliny the Elder, living in the first century AD, also described a gigantic squid in his "Natural History", with the head "as big as a cask", arms long, and carcass weighing . Tales of giant squid have been common among mariners since ancient times, and may have led to the Norse legend of the "kraken", a tentacled sea monster as