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It has been suggested that Tsunami fish be merged into this article. (Discuss) Proposed since May 2024.

Barred knifejaw
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Centrarchiformes
Family:	Oplegnathidae
Genus:	Oplegnathus
Species:	O. fasciatus
Binomial name
Oplegnathus fasciatus (Temminck & Schlegel, 1844)
Synonyms
Scaradon fasciatus Temminck & Schlegel, 1844

The barred knifejaw (Oplegnathus fasciatus), also known as the striped beakfish, is a species of marine ray-finned fish, a knifejaw from the family Oplegnathidae. It is native to the north-western Pacific Ocean, though a smattering of records exist from other localities in the eastern Pacific such as Hawaii and Chile. Recently introduced – probably via ballast water – in the central Mediterranean, it is found very rarely from Malta to the northern Adriatic.

It is an inhabitant of rocky reefs and occurs at depths from 1 to 10 m (3 to 33 ft). Juvenile members of this species can be found with patches of drifting seaweed. This species can reach a total length of 80 cm (31 in), with the greatest recorded weight for this species of 6.4 kg (14 lb). The color pattern consists of light and dark vertical bars from which it derives its name. The species feeds mainly on hard-shelled invertebrates such as crustaceans and molluscs. It is a commercially important species and is also farmed. It is also sought after as a game fish.

Tsunami fish

Five barred knifejaws endured more than 2 years in the partially submerged hull of the Japanese boat Saishoumaru (斎勝丸). The tsunami fish is the last surviving specimen those five knifejaws.

The boat broke loose and went adrift during the March 11, 2011 Tōhoku earthquake and tsunami. On March 22, 2013, the boat washed onshore in North America at Long Beach, Washington, more than 4,000 miles (6,400 km) from its starting point. The fish, as of December of 2013, resides at the Seaside Aquarium in Seaside, Oregon.

The Tōhoku earthquake occurred on March 11, 2011, and was the most powerful reliably measured earthquake in Japanese history. The resulting tsunami swept the 20 foot (6.1 m) Saishoumaru out to sea and inundated its storage compartments with seawater containing marine life, including several knifejaw fry. During the ensuing two-year drift across the Pacific Ocean, the fish matured into juveniles. Scientists speculate that the fish were deposited into the ghost ship by sea waves either off the coast of Japan or Hawaii.

The boat was discovered beached on the Washington coast on March 22, 2013, its internal hold now forming an "aquarium" for the five knifejaws as well as more than 30 plant and invertebrate species. Four were euthanized shortly after their discovery by the Washington Department of Fish and Wildlife, due to the concerns that the warm-water fish could become an invasive species. The fifth was brought to the city hall in a bucket, after which the Seaside Aquarium agreed to add the fish to their collection. As of late 2013, the fish is on display at the aquarium.

References

1. Atlas of Exotic Fishes in the Mediterranean Sea (Oplegnathus fasciatus). 2nd Edition. 2021. 366p. CIESM Publishers, Paris, Monaco. https://ciesm.org/atlas/fishes_2nd_edition/Oplegnathus_fasciatus.pdf
2. Froese, Rainer; Pauly, Daniel (eds.). "Oplegnathus fasciatus". FishBase. February 2014 version.
3. Marcus Hondro (7 April 2013). "Japanese striped beakfish rides in skiff from tsunami to America". Digital Journal. Retrieved 11 April 2020.
4. "'Tsunami Fish'". Seaside Aquarium. Retrieved 11 April 2020.
5. ^ Tobias, Lori (April 5, 2013). "Tiny fish that survived tsunami, ocean crossing from Japan makes debut in Seaside". The Oregonian. Retrieved 28 December 2013.
6. Pappas, Stephanie (April 5, 2013). "Live tsunami fish take slow boat to Washington state". NBC News. Retrieved 31 December 2013.
7. "Small Boat Confirmed as First Japan Tsunami Debris to Reach California". NOAA. April 26, 2013. Retrieved 28 December 2013.
8. "Seaside Aquarium Discovery Card - Tsunami fish". Retrieved 28 December 2013.

External links

• Boat found with live fish inside confirmed to be Japan tsunami debris, Washington State Department of Ecology

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