Marine Scotland has been accused of over-seeing "an environmental disaster" by mismanagement of inshore fishing areas where prawns and langoustines are caught.
Marine conservation areas have failed to protect wildlife from the fishing industry, according to a study by Scottish Government scientists.
Shellfish businesses across Scotland have been offered emergency financial help by ministers on the eve of a report by The Ferret revealing the crisis facing prawn and scallop fishermen.
Rogue scallop dredgers are allegedly sabotaging the gear of crab and lobster fishermen operating off Scotland's east coast.
Squid trawlers have been accused of "sticking two fingers up to the Scottish Government" by entering protected waters off the Berwickshire coast.
The number of fines issued to rogue fishermen has decreased over the past three years while skippers caught fishing in protected waters have not been reported to the procurator fiscal, we can reveal.
Video footage of damage to the seabed by illegal scallop dredging off Jura has been obtained by The Ferret, prompting calls for urgent enforcement action to be taken against rogue fisherman.
Marine wildlife in a vast area of ocean to the north of Scotland is at risk from trawlers because of a gaping loophole in international fishing regulations
The skipper of a scallop dredger registered in Scotland has been fined £1,000 after being caught fishing in territorial waters off Guernsey.