Why do crabs spit foam?
When we buy crabs, we always choose those that have hard shells and are actively producing a lot of white foam. What’s the reason behind this? As we know, crabs …
Why do crabs sometimes grow small one foot?
The limbs of a crab are symmetrical, with a pair of cheliped (pincer-bearing) legs and four pairs of walking legs growing on either side of its body, usually of similar …
Why do mature crabs go to sea?
Crabs, commonly known as river crabs or hairy crabs, are scientifically referred to as Chinese mitten crabs. They are famous freshwater crabs in China, distributed widely from Liaoning in the …
Why do shrimps and crabs change color?
Many animals have colors on their bodies that can change with variations in their living environment. These colors, resembling their surroundings, serve as a form of protection for themselves. Shrimps …
Why snails have a saliva line where they crawled?
Snails are terrestrial gastropod mollusks that are often found in vegetable gardens after rain, where they damage vegetables and other plants, making them harmful animals. Snails have four retractable tentacles. …
Why do the shells open after the clams are cooked?
In ancient times, there was a folk tale called “When the snipe and clam grapple, the fisherman gains.” It goes like this: “There was a bird called a snipe, which …
Why the mussel will not starve to death if the mussel shell is closed for a long time?
For aquatic creatures like river mussels, razor clams, or clams, as soon as they are removed from water, their two hard calcareous shells tightly close, making it difficult to pry …
How pearl is produced?
For creatures like river mussels and snails, their bodies are soft and without bones, but they have hard shells to protect themselves. Understanding how these shells are formed and what …
Why do people keep bleeding after being bitten by leech?
The leech is a type of annelid, similar in shape to an earthworm but slightly flattened. They vary in length, with larger ones reaching up to 20 centimeters and smaller …
Why can earthworms change the ground?
The body of an earthworm is like a slightly pointed cylindrical tube at both ends. Its digestive tract (including the mouth, pharynx, esophagus, gizzard, stomach, intestines, and rectum) resembles a …