Baby copperheads are among Ireland’s most common and, at one point, were the most common baby-eating fish in Ireland.
It was also the case that they were not uncommon in the wild, as they were the only fish to ever successfully breed in Ireland, according to Dr John Cuthbert, from the University of Limerick.
The species of fish, called silverfish, are native to the Northern Hemisphere.
In Ireland, the species is found in lakes, rivers and creeks and are considered a delicacy.
Dr Cuthbor, who is the director of the Centre for Aquatic Health, said silverfish were found in Irish lakes, but he was the first to identify them in Ireland’s freshwater habitats.
He said the species was one of the rarer species found in the region.
The silverfish was one part of a small group of species known as copperhead fish.
Dr John said silverhead fish had a more developed dorsal fin and had a wider body shape.
It is one of several species of freshwater fish that are found in Ireland and, therefore, they are known to be attracted to copperheads.
The main predators of silverhead were copperheads and other fish that feed on them, he said.
Dr Paul Pappalardo, from Natural History Museum, said copperheads were not the only species of aquatic fish to feed on silverheads.
“There are a number of species that eat silverheads in Ireland,” Dr Pappallardo said.
“Some of them are related to copperhead but the silverhead are by far the largest group of these fish.”
Dr Pannell said there was some debate as to whether silverhead had evolved to catch and eat copperheads or whether they had evolved for other reasons.
“Silverhead fish have been found to be eaten by silverheads, some silverhead have been eaten by copperheads, but some silverheads have been caught and eaten by the copperheads,” he said, adding that it was not possible to distinguish between the two species of fishes.
He said that fish could not survive in a tank for very long if the water temperature was low, but added that the silver fish were one of Ireland’s few freshwater fish. “
We are finding that they eat the silver heads but the question is whether or not the silver head eats the copper head.”
He said that fish could not survive in a tank for very long if the water temperature was low, but added that the silver fish were one of Ireland’s few freshwater fish.
In addition, there was an evolutionary struggle for the silverfish to survive in Irish freshwater habitats, as there was a shortage of silverheads and they were unable to feed off of them.
The National Museum of Ireland in Galway, where the fish were discovered, said the silver and copperheads had been discovered in two locations in the Limerick and Louth rivers.
In one, the specimen was found in a small pond.
In the other, the fish had been found at a pond in the city of Kildare, Dr Pinnell said.
The research was supported by the National Oceanography Centre.