Gurnard

Tub Gurnard

Gurnard are a small predatory demersal fish, found around most of the British Isles. They are a distinctive looking fish, with a number of unique features. They have a large head which is armoured and spines around the body to defend themselves. They also have feelers under the head which they use to ‘walk’ along the seabed. Gurnard also have large pectoral fins which they use to ‘fly’ through the sea. This method of swimming has led to gurnard being called sea robins throughout much of the rest of the world. An alternative name is feeler fish due to the sensory organs they walk on. The gurnard has a muscle which it can drum against its swim bladder to make a croaking or grunting noise. Gurnard are thought to communicate with each other in this way. Often they will make the noise when they have been caught, leading to another alternative name of croaker.

There are over a hundred different species of gurnard across the world. Three species have a wide distribution across the UK and are profiled in detail below. There are several other species which are much less common in the waters around the British Isles and are only briefly mentioned below.

 

Description

Gurnard

Gurnard are distinctive fish. In this picture the high head and leg-like feelers can be clearly seen.

All gurnards have a tapering cylindrical body and large triangular dorsal fin and long second dorsal and anal fins. Gurnard have a high broad head which is hard as its skull is made of solid bony plates. Tentacle-like feeler appendages  are located under the head which contain sensory organs to allow the gurnard to locate food (these are in fact adapted pelvic fins). Four non-poisonous spines project down from the pectoral fins and some specimens can have other smaller spines coming from the head. In tropical countries some gurnard species are poisonous, but non of the UK species are. The pectoral fins are large, and fan-like ‘wings.’ The tail is small and triangular and is only very slightly forked.

Tub Gurnard

Tub Gurnard

  • Also known as: Yellow Gurnard or Tubfish
  • Scientific name: Chelidonichthys lucerna or Trigla lucerna.
  • UK shore caught record: 12lb 3oz. UK minimum size: 11ins/28cm.

The biggest of the gurnard species, the tub gurnard can grow to around twelve pounds at its maximum size. However, the vast majority are much smaller than this, with a fish of two or three pounds being a good shore catch. They are also the most colourful of the species. Sometimes they are (as the alternative name suggests) a yellowy colour but can also be pink, orange and even bright red (confusing people into thinking they have caught a red gurnard). Underside is white or cream. This species has the biggest pectoral fin ‘wings’ and they are streaked with blue, and it is the presence of this colour on the pectoral fins which is the easiest way of identifying this species.

Red Gurnard

Red Gurnard

  • Scientific name: Aspitrigla cuculus.
  • UK shore caught record: 2lb 10oz.
  • UK minimum size: 9ins/23cm

Red gurnard are smaller than the tub, with a one pound fish being a decent catch from the shore, and a one and a half pounder approaching specimen status. The colour is generally a reddish, although in some fish it can be more of a brown colour. As discussed above this can lead to species confusion with the tub gurnard, as sometimes a tub gurnard can be redder than a red gurnard! The pectoral fins are therefore the best way of identifying this species – if blue is present on these fins it is a tub gurnard, if no blue is present then it is a red gurnard.

Grey Gurnard

Grey Gurnard

  • Scientific name: Eutrigla gurnardus.
  • UK shore caught record: 1lb 10oz.
  • UK minimum size: 9ins/23cm.

The grey gurnard are the smallest of the three main gurnard species. It can grow to almost three pounds, but shore caught are usually under a pound. Unsurprisingly the grey gurnard is usually a dark greyish colour on the back and flanks, although this can sometimes be nearer to black. This fades to a pale underbelly. The grey gurnard’s lateral line is made up of unusual bony, thorny scales, and its pectoral fin/wings are the smallest of the three.

Other Species of Gurnard

There are three other species of gurnard found in UK waters: the long finned gurnard (Chelidonichthys obscurus), the piper gurnard (Trigla lyra) and the streaked gurnard (Triglopourus lastoviza). The long-finned gurnard is a warm water fish that usually stays clear of Britain’s cold waters, only occasionally being found around the south in the English Channel, and the piper gurnard is a deep water fish that lives in water around one hundred metres deep. The streaked gurnard is the most common of these additional species, but even this is seldom caught by British sea anglers as it also prefers warmer waters and only comes into southern British waters in the summer.

Seasons, Distribution, Habitat and Feeding

Tub and grey gurnard are found throughout the UK in decent numbers. The red gurnard, however, is a fish that is generally found in the south of the British Isles, especially in the English Channel. Like other species such as pollock, the gurnard move out into deeper water in the winter and come into shallower waters to follow in the sprats, sandeels and other species in the warmer months. Spawning also takes place in the summer while the fish are in inshore waters. Gurnard are generally seen as a fish that prefers clean sandy or muddy ground. They will feed where there are offshore sandbanks or swim along sandy coastlines looking for gullies or features where sources of food have gathered. Although clean ground is the gurnard’s favoured hunting ground they will move over mixed ground if food sources are present there, and can also be found in clean patches of ground among rocky ground. All gurnard are predatory and will hunt sprats, sandeels and small mackerel and herring. They will also opportunistically feed on marine worms and crustaceans and scavenge on dead fish found on the seabed.

Changing Reputation of Gurnard as a Table Fish

Commercially Caught Gurnard

Gurnard have rocketed in reputation – and price – in recent years, and are now a top choice as a table fish.

Gurnard has suddenly become a valued table fish. Previously it was thrown back overboard as bycatch by trawlers, or used to bait lobster and crab pots. However, celebrity chefs and restaurant reviewers such as Rick Stein, Hugh Fearnley-Whittingstall and A.A. Gill began talking up the gurnard as a food fish. This had the result of gurnard going up in value from 25p per kilo to £4 per kilo and sales increasing by 1000% between July 2007 and summer 2008. Gurnard is now an established table fish, with red gurnard the variety most likely to end up on plates and menus. Gurnard stocks are in good shape due to stocks not being exploited in the past, and the fact that gurnard are early maturing and fast growing mean that, as long as commercial fishing is conducted responsibly, they are a sustainable species to catch commercially, even though the IUCN (International Union for the Conservation of Nature) have not evaluated this species in UK waters. All species of gurnard are currently promoted as a sustainable fish to eat, with the theory being that eating gurnard will take the pressure off over-exploited species such as haddock and cod.

Methods and Techniques to Catch Gurnard

Fishing for gurnard is best done on open sandy beaches, or beaches where there is light broken ground or scattered rocks which will hold sources of food, although the right rock mark which allows casts onto a sandy patch can produce excellent catches of gurnard. Two or three hook flapping rigs can be used if fishing close in, but if gurnard are not caught it can be better to switch to a one hook clipped down rig and go for distance in an attempt to seek out the feeding fish. Anglers generally use size 1 or 2 hooks, as the majority of gurnard can be quite small. Since gurnard are active hunters the addition of some kind of attractor spoon can help catches, and if fishing on a clean beach reeling in the rig a few yards every couple of minutes to add some movement which will interest and attract the gurnard. As always using a plain lead on a snag-free beach will allow the bait to move around and potentially find a fish-holding gully or other feature.

When it comes to bait fish is the best choice. Small to medium mackerel strips are the number one bait of anglers going for gurnard, although small lesser sandeels and strips of herring will also catch this species. However, as the gurnard is an opportunistic hunter it will show an interest in pretty much any bait, with ragworm, lugworm, mussels and other shellfish, squid and peeler crab all accounting for this species. As gurnard are hunters they can also be caught on lures, although this is not a reliable way to catch this species – probably because most lures are pulled through mid-water to catch fish hunting there, while gurnard are demersal (bottom) feeders. However, it is not unusual to see anglers fishing for summer mackerel with feathers or bringing in a gurnard, especially if the lures have been fished deep. As gurnard are visual hunters they feed well during daylight, and they don’t seem to mind calm and still conditions. All of this means that gurnard can provide catches and keep anglers entertained when other species are thin on the ground.

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