''Aulorhynchus'' is a

monospecific genus In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispec ...

of marine

ray-finned fish Actinopterygii (; ), members of which are known as ray-finned fishes, is a class of bony fish. They comprise over 50% of living vertebrate species. The ray-finned fishes are so called because their fins are webs of skin supported by bony or hor ...

belonging to the

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Aulorhynchidae Aulorhynchidae, the tube-snouts, is a small family of marine ray-finned fishes belonging to the suborder Gasterosteoidei in the order Scorpaeniformes. These fishes are found in the northern Pacific Ocean. Taxonomy Aulorhynchidae was first propo ...

. Its only species is the tube-snout (''Aulorhynchus flavidus'') which is found off the western coast of North America.

Taxonomy

''Aulorhynchus'' was first proposed as a genus in 1861 by the American

zoologist Zoology ()The pronunciation of zoology as is usually regarded as nonstandard, though it is not uncommon. is the branch of biology that studies the Animal, animal kingdom, including the anatomy, structure, embryology, evolution, Biological clas ...

Theodore Gill Theodore Nicholas Gill (March 21, 1837 – September 25, 1914) was an American ichthyologist, mammalogist, malacologist and librarian. Career Born and educated in New York City under private tutors, Gill early showed interest in natural histor ...

, when he described ''Aulorhynchus flavidus'', placing it in a new monotypic genus. The type locality is given as the coast of Washington. This genus is included in the family

in the suborder

Gasterosteoidei Gasterosteoidei is a suborder of ray-finned fishes that includes the sticklebacks and relatives, the 5th edition of ''Fishes of the World'' classifies this suborder within the order Scorpaeniformes. Systematics Gasterosteoidei is treated as a ...

of the order

Scorpaeniformes The Scorpaeniformes are a diverse order of ray-finned fish, including the lionfishes and sculpins, but have also been called the Scleroparei. It is one of the five largest orders of bony fishes by number of species, with over 1,320. They are ...

in the 5th edition of ''

Fishes of the World ''Fishes of the World'' by the American ichthyologist Joseph S. Nelson (1937–2011) is a standard reference for fish systematics. Now in its fifth edition (2016), the work is a comprehensive overview of the diversity and classification of the ...

''.

Etymology

''Aulorhynchus'', the genus name, is a combination of ''aulos'', meaning "flute", and ''rhynchus'', which means "snout", a reference to the flexible tubular snout of this species The specific name, ''flavidus'' means "yellowish".

Description

This species grows to in

total length Fish measurement is the measuring of individual fish and various parts of their anatomies. These data are used in many areas of ichthyology, including taxonomy and fisheries biology. Overall length * Standard length (SL) is the length of a fish ...

. It physically resembles the sticklebacks, but has a thinner, longer body, with 24 to 27 small spines in front of the

dorsal fin A dorsal fin is a fin located on the back of most marine and freshwater vertebrates within various taxa of the animal kingdom. Many species of animals possessing dorsal fins are not particularly closely related to each other, though through conv ...

Biology

''Aulorhynchus'' also possess a slender snout, hence the common name. Like the sticklebacks, it feeds on small invertebrates and fish larvae. Also, like sticklebacks, it produces a sticky secretion from its kidneys when breeding. Whereas sticklebacks use this secretion to bind plant matter together to create a nest, the tube-snout simply attaches its eggs to a substrate. ''Aulorhynchus'' attaches its eggs to

kelp Kelps are large brown algae seaweeds that make up the order Laminariales. There are about 30 different genera. Despite its appearance, kelp is not a plant - it is a heterokont, a completely unrelated group of organisms. Kelp grows in "underwat ...

, notably ''

Macrocystis pyrifera ''Macrocystis pyrifera'', commonly known as giant kelp or bladder kelp, is a species of kelp (large brown algae), and one of four species in the genus ''Macrocystis''. Despite its appearance, it is not a plant; it is a heterokont. Giant kelp is ...

''. Spawning occurs throughout the year, and males guard nest sites by actively defending them from predators. The nests are found at depths of 10–20 m and have been recorded up to 38 m.Limbaugh, C. 1962. Life history and ecological notes on the Tubenose, ''Aulorhynchus flavidus'', a hemibranch fish of western North America. ''Copeia'' 1962(3):549-555. The tubesnout feeds on small planktonic

crustacean Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group ...

s, including mphipod,

mysid Mysida is an order of small, shrimp-like crustaceans in the malacostracan superorder Peracarida. Their common name opossum shrimps stems from the presence of a brood pouch or "marsupium" in females. The fact that the larvae are reared in thi ...

s, and crab larvae. This species finds use as a denizen in public

aquarium An aquarium (plural: ''aquariums'' or ''aquaria'') is a vivarium of any size having at least one transparent side in which aquatic plants or animals are kept and displayed. Fishkeepers use aquaria to keep fish, invertebrates, amphibians, aq ...

Habitat

The tubesnout is found in shallow marine waters off the

Pacific The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the continen ...

coast of

North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...

to a depth of , from Prince William Sound in Alaska to Rompiente, Baja California. The species inhabits rocky crevices, kelp beds, eelgrass, and areas with a sandy bottom substrate.

References

* * {{Taxonbar, from=Q2983558 Aulorhynchidae Fish of North America Monotypic ray-finned fish genera