Class Osteichthyes Subclass Actinopterygii Infraclass Neopterygii Division Teleostei Order Percopsiformes Percopsidae 1. Percopsis omiscomaycus – Aphredoderidae 2. Aphredoderus sayanus – jugular vent Order Gadiformes Gadidae 3. Lota lota – single median chin barbel; pelvic fins jugular Order Atheriniformes Atherinidae 4. Labidesthes sicculus – long, slender; 2 separated dorsal fins; mouth like a beak; long anal fin Order Cyprinodontiformes Cyprinodontidae 5. Cyprinodon variegatus – small fish with small, superior mouth and arched back Fundulidae 6. Fundulus diaphanus – guppy-like mouth; head depressed; small upturned, superior mouth is protrusible; vertical bars on sides; dorsal fin in front of anal fin. 7. Fundulus heteroclitus – similar to F. diaphanus, but with blunt snout and not as elongate 8. Fundulus notatus – like F. diaphanus, but dorsal fin set further back, behind second ray of anal fin; lateral band distinct Poeciliidae 9. Gambusia holbrooki – gonopodium on males Order Gasterosteiformes Gasterosteidae 10. Apeltes quadracus – 4-5 dorsal spines; caudal peduncle slender and long 11. Culaea inconstans – 12. Gasterosteus aculeatus – usually 3 dorsal spines; caudal peduncle usually with a lateral keel Order Scorpaeniformes Cottidae 13. Cottus bairdi – 4 pelvic fin rays; incomplete LL; 2 separated median chin pores; 3-4 saddles; notched bar on caudal fin base; widespread 14. Cottus caeruleomentum – very similar (and formerly synonymous) to C. bairdi; band on caudal fin base usually not notched; Atlantic slope drainages 15. Cottus cognatus – very similar to C. bairdi; 3 pelvic fin rays; no palatine teeth 16. Cottus girardi – very similar to C. bairdi; median chin pores united into 1 pore Order Perciformes Moronidae 17. Morone americana – body deepest under spiny dorsal; first anal spine short; dorsal fins connected; sides may have faint lateral stripes 18. Morone chrysops – similar to M. americana; body deepest between dorsal fins; dorsal fins may be separated, but are not strongly connected; anal spines more graduated in size (first one not distinctly shorter than the second and third); tongue with a medial tooth patch 19. Morone saxatilis – larger, more slender fish with distinct lateral stripes; 2 parallel medial tooth patches on tongue 20. Morone chrysops x Morone saxatilis – intermediate characters of white and striped basses; lateral stripes often broken and irregular Centrarchidae 21. Ambloplites rupestris – 5-7 anal spines; large, terminal mouth; red eye; dorsum with saddles and sides with horizontal rows of spots Lepomis – 3 anal spines 22. Lepomis auritus – 23. Lepomis cyanellus – 24. Lepomis gibbosus – 25. Lepomis macrochirus – 26. Lepomis megalotis – 27. Micropterus dolomieu – 28. Micropterus punctulatus – 29. Micropterus salmoides – 30. Pomoxis annularis – 31. Pomoxis nigromaculatus – .