BY KATY GILL AND NICOLAS FERNANDES
This amazing footage taken by a scuba diver shows THOUSANDS of spider crabs migrating on ocean.
Giles Pollock, 33, took the footage while participating in group snorkeling in the Port Phillip Bay in Melbourne, Victoria, Australia on June 3.
The sea creatures, who had just shed their shells, were crawling all over each other to prevent predators from getting to them while their new shell was still soft.
The diver explained that the spider crabs do this every year from the end of May to mid-June.
Giles, an IT systems engineer, said: “It was certainly a pretty amazing site. I was quite thrilled to see so many in one place. There were easily thousands in that area and they went as far as we could see.
“The crabs are known to congregate in relatively shallow water in order to shed their old shells and allow their new shells to harden up.
“The benefit of doing this in large congregations such as shown in the video is to minimise the individual chance of any one crab being predated on by creatures that would attack them.
“The whole group was pretty thrilled with the experience, especially the newly certified divers who got to experience a real treat that can’t be found in the same way anywhere else in the world.”