Pacific rainbow smelt
species of Actinopterygii
The Pacific rainbow smelt (Osmerus dentex), also known as the Arctic rainbow smelt or cucumber fish in Japan, is a North Pacific species of fish of the family Osmeridae. The fish usually lives in marine and brackish environment, with a wide distribution from North Korea, Sea of Okhotsk to Bering Sea and British Columbia. They are also seen in estuaries and coastal waters of European and Siberian shores of Arctic Ocean from White Sea to Chukota in Russian Far East.
Description
The Pacific rainbow smelt has a cylindrical elongated body shape, with lengths ranging between 14 and 16 centimetres (5.5 and 6.3 in).
The body color is mostly silver. They usually prey on plankton and squid.
Life cycle
Pacific rainbow smelt usually return to their natal streams to spawn when the water temperature reaches 2 degree Celsius and above, but the degree of homing varies from one population to another and may be genetically controlled. Movement to spawning grounds are usually made at night when the spawning group crowd together and move upstream. The whole spawning usually lasts several hours each night for several nights. Many spawned-out fish, especially males, die after spawning, but those that survive would spawn again in the following year.
The public source identifies “Pacific rainbow smelt” as species of Actinopterygii. This brief keeps that definition visible, then builds a research path around Pacific, rainbow and smelt.
Why this record matters
A short description can identify a subject without explaining its stakes. For “Pacific rainbow smelt”, the useful work is to connect “species of Actinopterygii” to the records capable of establishing context and consequence.
The date and method of observation matter as much as the stated conclusion, especially where classification or consensus has changed. The source revision retrieved here is dated Jul 11, 2026. The linked authority identifier is Q28779521. None of the 0 selected statements returned an explicit reference.
A general summary may omit uncertainty, sample limits or methodological disagreement that is explicit in the technical record. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Check terminology, classification and the date of the cited evidence. Scientific names and technical consensus can change while older records retain historical value.
- Current terminology
- Classification context
- Finding cited technical literature
Primary datasets, specimen catalogues, standards bodies and the most recent peer-reviewed literature.
Three-step research path
- Establish the record: confirm the title “Pacific rainbow smelt”, its source revision and the description used here.
- Expand the search: follow Pacific rainbow smelt primary sources, Pacific rainbow smelt archive and Pacific research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Pacific rainbow smelt”?
- Is the terminology current, historical or disputed?
- Has classification or technical consensus changed since the cited source?
Search terms from this dossier
This entry incorporates text from “Pacific rainbow smelt” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.