The catfish in the Tarn River in southern France are so
aggressive when hunting that they'll push themselves on the
shore for the chance to snatch a pigeon: Other aquatic hunters
strand themselves in a similar way, includingbottlenose dolphins
from South Carolina, which drive small fish onto beaches, and
Argentinian killer whales, which swim onto beaches to snag
resting sealions. The behaviour of the Tarn catfishes is so
similar that Julien Cucherousset from Paul Sabatier University
in Toulouse describes them as “freshwater killer whales”.
Alerted to the fishes’ behaviour by local fishermen,
Cucherousset watched them from a bridge overlooking the island.
Over the summer of 2011, he filmed 54 attacks, of which 28
percent were successful.