Mussel, mussels (Caught at sea)
Capture method — Hydraulic elevator
Capture area — North East Atlantic (FAO 27)
Stock area — UK
Stock detail —
Mussels are widely cultivated and stocks generally considered to be under-exploited. The main methods of harvesting for wild and farmed mussels are dredging and hand-gathering. Hand-gathering is a more selective and sustainable method of harvesting mussels in the wild, and causes less disturbance than mechanical methods. The hydraulic elevator mussel fishery in the Exe estuary was certified as an environmentally fishery in July 2012.
Common mussels are bivalve molluscs found on shores throughout the north Atlantic, Mediterranean, North and Baltic Seas. They normally live in large aggregations, attaching themselves to rocks and each other with sticky threads known as byssus. They can be found from the high intertidal zone to the shallow subtidal zone. Found on the rocky shores of open coasts attached to the rock surface and in crevices, and on rocks and piers in sheltered harbours and estuaries, often occurring as dense masses. The shell is inequilateral and roughly triangular in outline. Size and shape vary considerably with environmental conditions, the colour usually purple or blue but sometimes brown. Shell smooth with a sculpturing of concentric lines but no radiating ribs. The ligament is inconspicuous. Length varies, specimens usually ranging from 5 -10 cm although some populations never attain more than 2-3 cm, and the largest specimens may reach 15 -20 cm. Mussels mature when one year old and may live 10-15 years or more. The breeding season is between April and September, with larvae settling after 1-6 months. Distribution: Very common all around the coast of the British Isles, with large commercial beds in the Wash, Morecambe Bay, Conway Bay and the estuaries of south-west England, north Wales, and west Scotland. Typically feeds on bacteria, phytoplankton, detritus, and dissolved organic matter (DOM).
No assessment of stocks by ICES in North East Atlantic. It is a non-pressure or unprotected species, i.e. not subject to quota restrictions. Wild mussel fisheries are found in tidal flats of the Wash, Morecambe Bay, Solway and Dornoch Firths in Scotland and river estuaries such as Conwy, North Wales and the Teign and Taw, Devon. The commercial development of natural beds is hampered by sporadic and unpredictable recruitment. There has been a move away from exploitation of wild stocks to cultivation in Britain. Cultivated beds are generally privately owned.
Mussel beds are managed locally. Bylaws may limit the minimum landing size of mussels, e.g. in the Wash in England a local bylaw prohibits the landing of mussels below 5cm in length. Some regions have closed seasons to protect the breeding stock, for example, the River Dart fishery in Devon is closed from the 1st April to 30th September each year.
The main methods of harvesting for wild and farmed mussels are dredging and hand-gathering. Hand-gathering is a more selective and sustainable method of harvesting mussels in the wild, and causes less disturbance than mechanical methods. Hydraulic elevators either use jets of water to disturb the ground in front of a towed dredge to capture bivalves, like razorshells and cockles, or use a pump to suck bottom sediments on board ship where bivalves are screened out and the spoil discharged back to sea. Impacts associated with this type of fishing can include removal of local populations of the target species, removal and disturbance of sediment with consequences for other species living there, and creation of spoil plumes and siltation.
Based on method of production, fish type, and consumer rating: only fish rated 2 and below are included as an alternative in the list below. Click on a name to show the sustainable options available.Abalone
Clam, Manila (Farmed)
Crab, brown or edible
Crawfish, Red Swamp
Lobster, Norway, Langoustine, Dublin Bay prawn or scampi
Mussel, mussels (Farmed)
Oyster, Native, oysters (Caught at sea)
Oyster, Native, oysters (Farmed)
Oyster, Pacific, oysters
Prawn, King (whiteleg), prawns
Prawn, Northern, prawns
Prawn, Tiger prawns (Farmed)
Scallop, King, scallops
Scallop, Queen, scallops
Squid, Japanese flying