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This bizarre fanged 'blackfish' is among the weird new species discovered in a volcano off the coast of Australia.

Scientists with the Commonwealth Scientific and Industrial Research Organisation (CSIRO) took the snap on a research voyage.

Apart from the scaleless blackfish - experts discovered an eel-like idiacanthidae and the chauliodontidae with huge front teeth, Mail Online reports.

Professor Iain Suthers, a marine biologist - and chief scientist on the voyage - said the discovery alter the way researchers study younger fish.

"We had thought fish only developed in coastal estuaries, and that once larvae were swept out to sea that was end of them," he said.

(Image: CSIRO News)

"But in fact, these eddies are nursery grounds for commercial fisheries along the east coast of Australia."

Four extinct volcanoes on the ocean-floor were also found during the research trip.