CATDOLL : CATDOLL: Place the prawns in a large beaker of water and observe their movement; can the prawns swim both forward and backward?

River shrimps can swim both forward and backward.

There is a sword-shaped protrusion at the front end of the carapace of river shrimp, 11 to 15 teeth on the upper edge, 2 to 4 teeth on the lower edge, and a hard shell on the body surface. The whole body is composed of 20 segments, 5 segments on the head, 8 segments on the thorax, and 7 segments on the abdomen. There are 5 pairs of walking legs, 2 pairs of which are pincer-shaped, and the last 3 pairs are claw-shaped. The appendages of the 6th abdominal segment have evolved into a powerful tail fan, which plays a role in maintaining the balance of the shrimp body, rising and falling, and retreating.

The body is slender, 1.5~3cm long, and the whole body consists of two parts: the cephalothorax and the abdomen. The cephalothorax segments are connected, and the back and sides are covered by the thorax or carapace. The cephalothorax is thick and gradually becomes thinner and narrower at the back. The frontal horn is located in the center of the front section of the cephalothorax, with a straight upper edge and a sharp end.

Additional information:

The living habits of river shrimp

1. River shrimps have a flat, elastic, translucent body in the middle and a fan-like tail. Shrimp are good swimmers and can use their legs to swim long distances. When they swim, their swimming legs frequently and neatly paddle backwards like wooden oars, and their bodies slowly move forward.

2. When frightened, its abdomen flexes and stretches quickly, its tail paddles downward and forward, and it can continuously leap backward at a very fast speed. Some shrimps are not good at swimming, and large lobsters spend most of their time crawling on the sand and rocks on the seabed.

3. River shrimps are widely distributed in my country's rivers, lakes, reservoirs and ponds. They are high-quality freshwater shrimps.

4. It lives in aquatic algae and grass in rivers, lakes and streams, and is distributed throughout the country.

Reference source: Baidu Encyclopedia - River Shrimp

1. Shrimp swim very slowly forward, but very quickly backward;

2. When shrimps encounter danger, they retreat quickly.

1. Shrimp swim very slowly forward, but very quickly backward;

2. When shrimps encounter danger, they retreat quickly.

How I think

I think it should be possible!