The Sea Fisheries Protection Authority (SFPA) says that a Spanish-registered fishing vessel was "operating within the waters of Bantry Bay and therefore within Ireland's 12-nautical mile limit" during what Irish fishermen in the South West claim was an attempted ramming incident.
The incident was filmed by the crew of the Irish trawler.
The Irish skipper can be heard on VHF radio telling the Spanish boat to 'stay away from us.'
The CEO of the Irish South and West Fish Producers, Patrick Murphy, called SFPA Chair Susan Steele and asked for immediate action.
Fishermen also called for the Navy to protect Irish fishing boats.
"The Sea-Fisheries Protection Authority are aware of a situation that arose when a Spanish registered vessel was encountered by an Irish-registered vessel operating within the waters of Bantry Bay and therefore within the IRL 12-nautical mile limit. The situation continues to be closely monitored by the National Fisheries Monitoring Centre at the Naval Base, Haulbowline," the SFPA said in a statement.
The incident happened on Friday morning, two days after fishermen staged a demonstration in Cork protesting at the dominant quotas held by non-Irish EU vessels in Irish waters.
"This was an attempt to force Irish boats off our own fishing grounds. It is intimidation. Our authorities must take action against this vessel acting extremely dangerously at sea and endangering life," the Chief Executive of the Irish South and West Fish Producers' Organisation, Patrick Murphy, said. "It is appalling. This was a threat to life at sea, so action must be taken against the vessel which tried to do the ramming. The Spanish boat should be arrested and stopped from fishing in Irish waters."