Which of these fish displays tool-using behaviour?

The blackspot tuskfish (pictured) is a wrasse native to the Indian Ocean and the western Pacific Ocean from Mauritius to Indonesia and Australia north to the Ryukyu Islands. Its scientific name is “Choerodon schoenleinii” in honour of Johann Lucas Schönlein (1793-1864), the German naturalist and professor of medicine.

This species occurs on reefs, preferring areas with sandy substrates or areas of weed growth. It can be found at depths from 10 to 60 metres (33 to 197 ft), though rarely deeper than 20 metres (66 ft). It can reach 100 centimetres (39 in) in total length, and the greatest published weight for this species is 15.5 kilogrammes (34 lb). It is important to local commercial fisheries and is also farmed. It is popular as a game fish, in particular with spearfishers, and can be found in the aquarium trade.

In July 2011, a professional diver photographed a blackspot tuskfish bashing a clam on a rock to break the shell, apparently a use of the rock as a tool, the first documented example of tool use in wild fish.