Tub Gurnard Fishing: The Fish Whose Every Name Is Borrowed
The last poles of this series sat in the rule: a rule with an expiry date, and most recently a rule that ends at the kind of water while the fish swims on. The tub gurnard leads back to the fish itself — more precisely, to its name. For almost every fish the name describes something about it: a colour, a shape, a place. For the tub gurnard, not one part of its scientific name describes this animal. The genus comes from a bird, the species name from a lamp that originally belonged to a different fish, and the old genus from the red mullet. Hence this article’s pole: the fish whose every name is borrowed. The fish meant here is *Chelidonichthys lucerna*, at home in the Mediterranean and the Atlantic.
Swallow, lamp, red mullet: three names, three borrowings
The origins are recorded by The ETYFish Project, an etymological register of fish names. First, the genus Chelidonichthys: Greek *chelidon*, the swallow, and *ichthys*, fish. ETYFish’s explanation: “presumably referring to bird-like wingspan of large pectoral fins” — fins the ancients even believed could fly. Second, the species name lucerna: Latin for “lamp” — and according to ETYFish originally a common name for the flying gurnard *Dactylopterus volitans*, a different family. It goes back to Pliny, who wrote that its fiery red tongue glowed at night. Only during the Renaissance did people in Liguria and Venice use the name for this or a related fish. Third, the old genus Trigla, under which the gurnard was long listed: according to ETYFish the classical name of the red mullet, *Mullus barbatus*. Artedi grouped the two together, possibly because both make sounds when pulled from the water; Linnaeus separated them and gave the name to the gurnards — “contrary to ancient usage”.
And it gets more tangled. The swallow explanation for the genus points to the species *C. hirundo* — and *hirundo* is also Latin for “swallow”. According to ETYFish, *hirundo* is now a junior synonym of C. lucerna. So the same fish once carried “swallow” as its species name before “lamp” became the valid one. ⚠️ A guardrail here: ETYFish explains what the namers presumably meant, and says so itself (“presumably”, “possibly”). It is careful interpretation, not a deed of record.
One Europe, two bird camps
The common names do not make it simpler, only more colourful. In the GBIF vernacular list for *Chelidonichthys lucerna* (key 2336774, 119 entries) Europe splits into two camps — and both reach for a bird. The swallow camp: Greek “Χελιδονάς”, French “hirondelle de mer” and “trigle hirondelle”, Turkish “kırlangıç balığı” — all three literally mean “swallow” or “swallow-fish”. The chicken camp: German “Knurrhahn”, Italian “Capone gallinella”, Maltese “Tigiega” and “Kappun”, Albanian “Gjel i hirte”, Russian “Морской петух желтый”, the yellow sea rooster. One camp names how the fish looks with its fins spread. The German Knurrhahn — literally the “growling rooster” — carries in the word itself how it sounds.
💣 This time’s naming trap: in the same list, the German section carries, next to “Knurrhahn” and “Roter Knurrhahn”, the entry “Seeschwalbe”. In German that is the name of an entire family of birds, the terns. Search for it and you land on birds, not the fish. And the reverse: for Croatian, Slovenian, Japanese and Arabic the list carries no name for this species at all — although gurnard is an everyday food fish on the Adriatic. The gap therefore sits not where the fish is absent, but where nobody made the entry.
The growl is real — and it has a motor
The growling in the German name is no exaggeration. A University of Auckland study (Radford, Ghazali, Montgomery and Jeffs, PLOS ONE, 2016) describes the mechanism: the sounds are thought to be produced by contractions of paired sonic muscles sitting on the swim bladder. For the gurnard family as a whole, the study summarises the literature: knocks, grunts and growls made of pulses lasting 10 to 3000 milliseconds, with peak sound energy between 250 and 600 hertz. It measured four sound types in two classes, grunts and growls, with mean peak frequencies from 129 to 215 hertz; the fish called around the clock, with more sounds at dawn and dusk.
⚠️ The guardrail belongs right next to it: the measurements come from the bluefin gurnard *Chelidonichthys kumu* of New Zealand — a different species of the same genus, not *C. lucerna*. The animals studied were females in captivity. The family values are a summary of the literature, not a measurement of their own. So this article does not claim that a gurnard on your line produces exactly these frequencies or bites better at dusk. It only says: the growl when you land one has an anatomy.
Three fingers that taste the seabed
The most useful fact for anglers is in the FishBase species page for *C. lucerna*, and it is a sentence about the pectoral fins: the gurnard “has three isolated rays on the pectoral fin which function as legs on which the fish rests and also help in locating food on the soft bottom”. Three free fin rays to rest on, walk across the seabed with and find food in soft ground. From the same page: marine, demersal, depth range 20 to 318 metres, 8 to 24 °C, living on sand, muddy sand or gravel, feeding on fish, crustaceans and molluscs. Maximum 82.8 centimetres, commonly around 30 centimetres. ⚠️ FishBase is a compilation that cites its sources — the figures appear here as FishBase data, not as our own measurements.
What this means at the water
- Fish the bottom, on soft ground. A fish that walks on three rays across sand, mud and gravel and feels for food there is searching the bottom, not mid-water. Bait and rig belong on the seabed.
- Keep it slow. It finds food by working along the bottom; a bait that drags over the ground or pauses briefly suits that way of searching better than a fast retrieve.
- The growl is not an alarm. Sounds when landing are normal for this fish family; they say nothing about injury or size.
- Mind the head and gill covers. Gurnards have a hard, armoured, spiny head; handle them with a wet cloth or a glove.
- Check the rules yourself. This article deliberately gives no minimum sizes and no closed seasons — they differ by country and sea area, sometimes by region. What governs is the competent fisheries authority, not this text; this is not legal advice.
One last honest note: no threat category (such as IUCN) appears here, because it was not taken from a verified primary source. And the gurnard is a fish few anglers target on purpose but many are glad to keep, once they know where the soft ground lies. StrikeAhead reads conditions and depth and learns from your catches; the app tells you when it is worth going, and StrikeAhead Pathfinder tells you who to head out with on unfamiliar water — curated, personally vetted, with verified catches instead of promo photos.