A video shot by a French environmental NGO in the Mediterranean Sea shows masks and gloves littering the seabed.
Opération mer propre (Operation clean sea) is trying to clean up the coast near the Côte d'Azur resort of Antibes.
It is appalled by this new coronavirus pollution, which adds to the already chronic problem of plastic pollution.
The group says it is sounding the alarm, as Europe slowly emerges from lockdown and people start revisiting beaches in the hot weather.