Diver swimming through dense school of Sand smelts (Atherina presbyter), Canary Islands

At night that they are attracted by the light from our torches. Feeling yourself being hit by thousands of little fish is a unique experience, but one that can be frightening, despite their small size. They hit you all over the body, as if they were bullets. They go everywhere... between your fingers, in your diving suit and even some in your regulator.