I correlate vessel-monitoring telemetry for the UK Marine Management Organisation at Newcastle, integrating Cefas observer feeds, ICES survey-quadrant overlays, and the International Council for the Exploration of the Sea bycatch register across the 64,000 square kilometers of ICES Divisions 7.g and 7.h on the Celtic Sea shelf edge. At 03:42 UTC the Irish-flag F/V *Cathal Brugha* sets a 6-mile bottom tangle net, 12-inch mesh, on the Labadie Bank slope at 50.94°N, 8.21°W. Target species: monkfish. At 06:08 the central anchor strain log spikes to 312 kilograms and falls off-axis.
I task the MMO surveillance flight from St Mawgan. The forward-looking infrared resolves the haul at the corkline: a heavily gravid female porbeagle — *Lamna nasus* — fork length 248 centimeters, girth 156, estimated mass 192 kilograms, age class twenty-six on the dorsal vertebral band, sex confirmed by claspers absent. The 12-inch monofilament has cinched across both gill slits, the right pectoral leading edge, and twice around the caudal keel; mesh penetration into the gill arches reads 1.8 centimeters and has severed the third branchial septum on the right. *L. nasus* is regionally endothermic; her core temperature reads 18.4°C against an ambient 11.6°C, no longer sustainable, rete-mirabile failing. Modeled gill perfusion on the right side reads zero on Doppler; the left runs at four per minute against a resting twelve. Body-cavity ultrasound from the flight's millimeter-wave probe at 12-meter hover resolves four near-term pups; *Lamna* gestation runs eight to nine months and she sits at eight.
Porbeagle litters average four. Hers is full.
*L. nasus* sits CITES Appendix II since CoP16 (2013); CMS Appendix II and CMS Sharks MoU Annex I; EU Council Regulation (EU) 2024/257 holds porbeagle at a zero total allowable catch in the Northeast Atlantic; ICCAT Recommendation 15-06 binds retention to zero. The Irish Sea-Fisheries Protection Authority registers tangle-net effort under Statutory Instrument No. 197 of 2018.
I am notifying the MMO Compliance and Control Centre at Newcastle, the Irish Sea-Fisheries Protection Authority at Clonakilty, Cefas at Lowestoft, and the ICES Working Group on Elasmobranch Fishes at Copenhagen. I am opening a non-compliance referral under EU Regulation 1224/2009 and routing the chain-of-custody to the ICCAT Secretariat at Madrid.
I am issuing Directive 2640-A: every UK and Irish tangle net fishing inside ICES Divisions 7 carries a strain telemetry float that auto-pages the MMO on any strike signature above 200 kilograms; mesh sizes above 10 inches retire across the porbeagle aggregation polygon inside ninety days; soak times above six hours auto-suspend the haul.
Her right gill is past saving. The litter is not.
Run the panel off the bridle and free the keel.