How are sea urchins born and how long do small sea urchins grow up

Under normal circumstances, sea urchins can mature in about 3 years, and adult sea urchins begin to perform the task of reproducing offspring. When they reproduce, male sea urchins will excrete sperm first, and female sea urchins will excrete eggs 1-2 days after excretion. When they combine, they will first develop into an organism similar in shape to snake tail larvae. After a few weeks, they will become adults, about 1mm in size. After continuous development, it will become a sea urchin.

1. How are sea urchins born

Under normal circumstances, it takes about 3 years for sea urchins to mature, and adult sea urchins will reproduce their offspring. When they reproduce, male sea urchins will excrete sperm first, and then female sea urchins will excrete eggs about 1-2 days after they excrete sperm. When sperm and eggs combine, they develop into an organism similar to snake tail larvae. After weeks of swimming and eating, they become sea urchins.

At this time, their size is relatively small, only about 1mm. Then, after continuous evolution, new tube feet are formed, and finally sea urchins are developed. Sea urchins reproduce differently from other animals. When one sea urchin excretes sperm and eggs in the sea area, other sea urchins will receive the information and follow them to excrete sperm and ovulate. This strange phenomenon is described as "reproductive infectious disease".

How long does the baby urchin grow up

It takes about one year for the baby urchin to grow up, because it takes several months from birth to growth. After growing into adults, small sea urchins are not mature. Because they don't have the ability to reproduce at this time, they need to grow for about 3 years, so under normal circumstances, it takes 3 years for small sea urchins to mature.