Thysanoteuthis rhombus are distinguishable by the presence of arms with two series of suckers, whereas the tentacular clubs have four. It lacks photophores. T. rhombus is named for its fins, … See more

The predators that feed on T. rhombus include various species of ommastrephid squids, dolphin fish, lancet fish, tuna, swordfish, See more

The pairing of males and females occurs at an immature stage where mantle length is less than 100mm and pairs remain monogamous. Mating occurs in a head-to-head position, in … See more

• Cephalopod size
• Humboldt squid See more

T. rhombus has a relatively low population density, which has led to a unique situation among squids, namely monogamy, where male and female couples of the … See more

In subsurface water levels, T. rhombus juveniles were found to feed on crustaceans, small cephalopods and fishes. As adults, the stomach contents of the Diamond squid … See more

T. rhombus is targeted by growing fisheries in near southern and central Japan due to its firm and flavorful flesh. The main fishing grounds are in the Sea of Japan See more