| Bothragonus swanii | |
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| A rockhead on top of a rock scallop at the Oregon Coast Aquarium. | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Perciformes |
| Family: | Agonidae |
| Genus: | Bothragonus |
| Species: | B. swanii |
| Binomial name | |
| Bothragonus swanii (Steindachner, 1876) | |
| Synonyms | |
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Bothragonus swanii, the rockhead, deep-pitted poacher or deep-pitted sea-poacher, is a fish in the family Agonidae. It was described by Franz Steindachner in 1876, originally in the genus Hypsagonus. It is found in the eastern Pacific Ocean from Alaska to Carmel Bay, California down to depths of 18 metres. It can also inhabit the intertidal zone. Males can reach a maximum total length of 8.9 centimetres.
The species epithet "swanii" refers to James G. Swan of Port Townsend, Washington. The rockhead spawns nearshore, during the months of January–May in the California Current region. Its diet consists of benthic shrimp and crabs.
References
- Synonyms of Bothragonus swanii at www.fishbase.org.
- Common names for Bothragonus swanii at www.fishbase.org.
- ^ Bothragonus swanii at www.fishbase.org.
- Steindachner, F. 1876 Ichthyologische Beiträge (V). . Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 74 (1. Abth.): 49-240, Pls. 1-15.
- Spawning for Bothyragonus swanii at www.fishbase.org.
- Food items reported for Bothragonus swanii at www.fishbase.org.
| Taxon identifiers | |
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| Bothragonus swanii | |
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