Red Sea groupers gesture to invite giant moray eels to hunt
It may be stereotyped, genetically programmed behaviour (as my friend GL felt obliged to point out), but the link my roomie Jenneke sent me is still the best case of gesturing fish I have seen (see earlier observations about the John Dory and the Octopus). In a spectacular study Redouan Bshary, Andrea Hohner, Karim Ait-el-Djoudi, [...]
