Spanish media 'piranha alarm': Hungry fish bite the tourists

They literally have a voracious appetite, and that's why they nibble vacationers! In the process, there can even be small bloody injuries caused by the sharp teeth of the fish.

Reason for the increased appetite of the fish, according to scientists, is the higher water temperature resulting from climate change.

This accelerates the metabolism of the fish, causing them to need more food," quoted the newspaper Alfonso Ramos, a researcher in the Department of Marine Science and Applied Biology.

Usually, it's very rare for fully grown fish to bite humans," explains marine biologist Garcia, "Typically, it's a few days or weeks old juvenile fish that are so small and transparent that you can hardly spot them in the water."