As the Japanese spider crab grows, it sheds its thick, protective exoskeleton, discarding it so it can grow larger. The process is fascinating to watch but lengthy, taking up to six hours. SeaWorld San Diego, however, recently released a time-lapse video of the processes, condensing it into 30 seconds.

In the video, shared by Reuters, a Japanese spider crab can be seen emerging, in a vivid shade of red, out of the shell it no longer needs.

The species of marine crab has the largest leg span among arthropods and can weigh up to 19 kg.