Drum shrimp:
Alias gaba shrimp, kata shrimp, gun shrimp, hairtail shrimp, dog shrimp, clapboard shrimp, gaba shrimp and raw shrimp. Macrobrachium belongs to Arthropoda, Crustacea, Decapoda and Macrobrachium, which is a family with rich species and high ecological diversity.
Morphological characteristics:
The body length of drum shrimp is generally 35-55 mm, and its back is brown or its edge is brown. The frontal angle is slender and extends to the end of the 1 segment of the frontal stalk. The posterior ridge of frontal angle is not obvious. The big pliers are very long, four times the width. The length of the palm is about twice that of the finger. There are 1 deep notches on the inner and outer edges of the palm behind the movable finger root, and 1 short spines on the back side of the outer edge. Small pincers are slender, equal to or longer than large pincers, and there are 1 spines on the dorsal surface of the outer edge of the palm near the movable finger roots. There is no longitudinal groove on the back of the caudal segment, but there are two pairs of strong movable spines. Drum shrimp is called drum shrimp because it will open and close the fingers of its big claws when it meets the enemy and make a sound like a small drum.
Extended data
Living habits:
Undergraduate students are mostly burrowing or lurking species, mostly living in tropical and subtropical shallow seas, with the Indian Ocean-Western Pacific region being the most abundant, and a few species living in cold temperate zones. Almost all prawns live on the bottom of the sea, and rarely swim beyond the bottom. A small number of shrimp live in low-salt environment, and also live in mangroves, estuaries and deep-sea areas. It is the most common shrimp in soft and hard marine sediments, and sometimes it is the dominant order in species and individuals. .
Drum shrimp camps live freely or * * *, and many drum shrimps live with other creatures such as sponges, echinoderms, mollusks, echinoderms, other crustaceans, insects and gobies.
The relationship between drum shrimp and goby is very interesting, because drum shrimp has poor eyesight and needs a companion like a watchdog. The goby always guards the cave where they live. Whenever there is danger, the goby will wag its tail to inform its companions. Shrimp drum will keep digging sand and mud to keep the cave open in return.
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