The ecologist organization Eguzki has denounced that these small sharks "have been returned to the sea before being caught after being caught by a boat, killed but without proper measures or for their little commercial interest." Although this practice is not sustainable, Eguzki has denounced that it is absolutely common.

Two years ago he noticed a similar case at the mouth of the port of Pasaia, revealed by Diving Donostia. Then they also found hundreds of cats dead.