Conservationists are continuing to monitor a freshwater pond in Somerset where two piranha-like fish were found.

The red-bellied pacu, which are native to the river basins of Brazil, were both more than 50 centimetres long and weighed over eight pounds when they were fished out of the pond by wildlife ecologist Mark Outerbridge.

Experts believe the fish were deliberately dumped and that there could be more.

Yesterday, Dr Outerbridge returned to the pond to see if he could catch more pacu, however, the fish did not bite and he left empty-handed.