A, crabs can live for how long crabs are a kind of animal we often see, belongs to the crustacean. Crabs are more varieties, living in different waters in the crab can live a different time, and sometimes the difference is relatively large. For example, crabs that live in shallow waters can generally live for about three years. Other crabs that live in deeper waters can live for decades, which is a very long time. Although their theoretical lifespan is relatively long, there are many factors that can affect how long they live, such as environmental pollution and artificial hunting, which may shorten their lifespan.
The crabs that can live for a shorter period of time are the artificially farmed crabs, many of which are used for food, so basically they don't live for long. Generally speaking, the life span of these crabs is just about 22 months, and they are sold off soon after they have been farmed for a while.
Second, the crab can grow how big crab varieties are more, these varieties of body size are different, and sometimes the difference is relatively large. Larger crabs such as the Alaskan king crab, their shell length can reach 28 centimeters and their weight can reach about 10 kilograms. When their legs are stretched out, they can be more than 1 meter long, and some can be close to 2 meters; there are also giant crabs, whose bodies can grow to about 38 centimeters in length, while their weight can reach more than 20 kilograms. When their two chelipeds are extended, the span can reach 4.2 meters.
Of course, not all crabs can grow this big, and many others are smaller in size themselves, such as some hairy crabs whose shells are only about 6 centimeters in diameter. In addition, even the same species can have slight differences in size due to different environmental factors around them.