todarodes sagittatus is one of the main cephalopod resources in the world. High yield, rich nutrition, fresh and dry products are good products.

The carcass of todarodes sagittatus is conical, and the rear part is obviously thin and concave. The color of the rear end of the domestic market, the left and right sides of the back of the head and the center of the sessile wrist is also close to brown and black. There are no small capsules on both sides of the shallow cave at the front of the funnel. The length of the fin is about one-third of the length of the carcass, and the two fins meet in a slightly transverse rhomboid shape. The length of the sessile wrists is not much different, the wrist type is generally 3>2>4>1, the third pair of wrists is very flat on the sides, the central part is protruding, and it is slightly triangular in shape. There are 2 rows of suckers on the wrists, and the horny ring of the suckers has sharp teeth. The 4th wrist on the right side of the male is stalked, the inner surface is relatively flat, the top sucker is specialized into 2 rows of fleshy protrusions and meat slices, the outer line is pointed small fleshy protrusions, the inner line is pure head and thin fleshy slices, the specialized part accounts for about One-third of the whole wrist; todarodes sagittatus 4 rows of suckers, the middle 2 rows are large, the edge, top and base are small, the large sucker horny ring has pointed teeth and semicircular alternate teeth, the small sucker horny ring Some have pointed teeth, and there are 2 rows of sparse suction cups on the top of the tentacles, arranged in a staggered manner. The inner shell is horny, narrow and strip-shaped, with a thin central axis, thick side ribs, and a hollow narrow longitudinal diamond-shaped "caudal vertebra" at the rear end. The maximum carcass length of an adult is known to be 300 mm.