- any freshwater fish of the genus Thymallus, related to the trouts but having a longer and higher, brilliantly colored dorsal fin.
- any of several grayish or brownish satyr butterflies.
- any freshwater salmonoid food fish of the genus Thymallus and family Thymallidae, of the N hemisphere, having a long spiny dorsal fin, a silvery back, and greyish-green sides
- any butterfly of the satyrid genus Hipparchia and related genera, esp H. semele of Europe, having grey or greyish-brown wings
