Bottlenose dolphins that have learnt to use sea sponges as hunting tools form cliques with others that do the same — the first evidence of animal grouping based on mutual interest, a study said Tuesday. (via Dolphins sponge up culture: study)

Bottlenose dolphins that have learnt to use sea sponges as hunting tools form cliques with others that do the same — the first evidence of animal grouping based on mutual interest, a study said Tuesday. (via Dolphins sponge up culture: study)