Microstomatidae

Pencil smelts

21 species

1. 1Microstoma australis Gon & Stewart, 2014ocean · deep-water
2. 2Microstoma microstoma (Risso, 1810) · Slender argentineocean · deep-water
3. 3Nansenia ahlstromi Kawaguchi & Butler, 1984ocean · deep-water
4. 4Nansenia antarctica Kawaguchi & Butler, 1984ocean · temperate
5. 5Nansenia ardesiaca Jordan & Thompson, 1914 · Robust smallmouthocean · deep-water
6. 6Nansenia atlantica Blache & Rossignol, 1962ocean · tropical
7. 7Nansenia boreacrassicauda Poulsen, 2015ocean · deep-water
8. 8Nansenia candida Cohen, 1958 · Bluethroat argentineocean · deep-water
9. 9Nansenia crassa Lavenberg, 1965 · Stout argentineocean · subtropical
10. 10Nansenia groenlandica (Reinhardt, 1840) · Greenland argentineocean · deep-water
11. 11Nansenia iberica Matallanas, 1985ocean · deep-water
12. 12Nansenia indica Kobyliansky, 1992ocean · deep-water
13. 13Nansenia longicauda Kawaguchi & Butler, 1984ocean · deep-water
14. 14Nansenia macrolepis (Gilchrist, 1922)ocean · subtropical
15. 15Nansenia megalopa Kawaguchi & Butler, 1984ocean · deep-water
16. 16Nansenia oblita (Facciolà, 1887)ocean · temperate
17. 17Nansenia obscura Kobyliansky & Usachev, 1992ocean · deep-water
18. 18Nansenia pelagica Kawaguchi & Butler, 1984ocean · tropical
19. 19Nansenia tenera Kawaguchi & Butler, 1984ocean · subtropical
20. 20Nansenia tenuicauda Kawaguchi & Butler, 1984ocean · deep-water
21. 21Xenophthalmichthys danae Regan, 1925ocean · tropical

Source: FishBase v25.04 (fishbase.org), via cboettig/fishbase, fetched 2026-10-18.