Fish

Mioplosus labracoides

Perch-like predator

Mioplosus labracoides is the elongate, bass-like predator of Fossil Lake, usually found alone rather than in schools, and often preserved with prey in its mouth. It is uncommon enough to command a premium over Knightia and Diplomystus. Look for its long body, single continuous dorsal fin and large mouth.

PhylumChordata
ClassActinopterygii
OrderPerciformes
FamilyMoronidae
GroupFish
Rank (PBDB)genus· Paleobiology Database
AuthorCope 1877· Paleobiology Database
Classification (PBDB)Chordata › Osteichthyes › Perciformes › Percidae· Paleobiology Database
Range (PBDB)56–51.1 Ma· Paleobiology Database
PBDB occurrences3· Paleobiology Database

Elsewhere

Cite this article

Stratum Study. "Mioplosus labracoides" (Taxon). Stratum Study pack 2026.09, as of 2026-09-19. https://stratum.black/study/taxa/mioplosus-labracoides. Accessed 2026-09-20.

@misc{stratum-mioplosus-labracoides,
  title        = {Mioplosus labracoides},
  author       = {{Stratum Study}},
  howpublished = {\url{https://stratum.black/study/taxa/mioplosus-labracoides}},
  year         = {2026},
  note         = {Taxon article, Stratum Study pack 2026.09, as of 2026-09-19; sources: stratum, pbdb. Accessed 2026-09-20.}
}

Citations carry the pack version and the article's as-of date so they resolve to the same text later. The facts themselves belong to the sources listed below; cite those for the science.

Sources for this article: Stratum editorial (Stratum editorial);Paleobiology Database (CC-BY-4.0). As of 2026-09-19; Study pack 2026.09. Data reproduced under the licences shown; text in Stratum's own words unless a section names its source.

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