The Isle of Man government has warned that illegal fishing in its waters will not be tolerated after a fisherman was prosecuted for catching scallops.
Malcolm McKelvie, skipper of the Star of Annan, was fined £7,000 by the High Bailiff after he admitted catching scallops under the legal size to sell.
The ship was four miles off the coast when the incident took place.
The Isle of Man government said it hopes other fishermen would now be deterred from "making a quick buck".
Phil Gawne, minister for the department of agriculture, fisheries and forestry, said: "The Isle of Man has built an enviable reputation for sustainable management of our scallop stocks.
"Those few irresponsible fishermen, who are willing to put their own, and others' livelihoods at risk will have to learn that such behaviour will not be tolerated in the Manx Territorial Sea.
"The considerable volume of small scallops found on board this vessel indicates the complete disregard that this skipper had for the long-term welfare of the Manx fishery."
McKelvie's ship has been detained until the fine is paid.
The fisherman, from Scotland, was also banned from fishing in the island's waters for seven days.
According to government policy scallops must be a minimum size of 110mm to be caught and sold.
Mr Gawne added: "The Department is committed to the conservation and preservation of the Manx scallop fishing industry, this gives a clear message to other vessels operating in the fishery."