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Mioplosus labracoides eating a Diplomystus dentatus

An orangish fish fossil, facing right, eating another fish head-first on tan stone.

The mouth of Mioplosus, an extinct perch-like fish, was lined with numerous tiny sharp teeth. This aided in grasping prey, but also prevented them from expelling fish too big to ingest. The specimen is approximately 9 cm long and is in a private collection.

U.S. National Park Service

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Fossil Butte National Monument, Code: FOBU

Fossil Butte National Monument, Lincoln County, Wyoming
Latitude: 41.8563003540039, Longitude: -110.762001037598

NPS.gov Collection

7/16/2010 1:06:01 AM

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Monday, February 8, 2021 4:08:47 PM

Monday, May 9, 2022 9:18:09 PM

FOBU11407_RH-24 full matrix.tif

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Scenic