Bottlenose dolphins are intelligent hunters. Some work alongside human fishers, coaxing fish ashore. Others use shells to catch their meals. Within the Florida Keys, some use “mud rings” – and now the behaviour has been documented within the Caribbean too.
The mud ring searching technique is a case of blindsiding prey. A “ring maker” dolphin circles close to the ocean ground and traps fish behind a hoop of mud as others lie in wait with mouths open, and lunge to catch any fish making an attempt to flee the mud by leaping out of the water.
This behaviour had been seen solely within the …