Fundulus confluentus

Fundulus confluentu
Marsh Killifish – Fundulus confluentus – Male
FamilyScientific NameAuthorYearCommon Name
FundulidaeFundulus confluentusGoode and Bean1879Marsh Killifish

Fundulus confluentus

Unique Characters: Pale spot on body at dorsal fin origin. Five gill rakers. Males with numerous dark vertical bars on side of the body; female with ocellated black spot in dorsal fin. Jaw teeth in more than a single row. 9 or more scale rows between origin of dorsal fin and origin of anal fin. Dorsal fin origin over or anterior to anal fin origin. Dorsal-fin soft rays 10-15. Mouth level with, or slightly above, a horizontal line drawn through the middle of the eye. Origin of dorsal fin more or less over origin of anal fin.

Similar Species:

Spotfin Killifish Fundulus luciae

Striped Killifish
Fundulus majalis

Mummichog Fundulus heteroclitus

Fundulus luciae
Spotfin Killifish – Fundulus luciae
Fundulus majalis
Striped Killifish – Fundulus majalis – Female
Fundulus heteroclitus
Mummichog – Fundulus heteroclitus

Spotfin Killifish Fundulus luciae. Distinct, dark predorsal median stripe. Male with ocellated black spot in dorsal fin. Jaw teeth in more than a single row. 9 or more scale rows between origin of dorsal fin and origin of anal fin. Dorsal fin origin distinctly behind origin of anal fin. Dorsal-fin soft rays 8-11.

Striped Killifish Fundulus majalis. Long snout. Female with black stripes on sides, males with vertical bars. Dorsal-fin soft rays 14-15. Jaw teeth in more than a single row. 9 or more scale rows between origin of dorsal fin and origin of anal fin. Dorsal fin origin over or anterior to anal fin origin. Mouth distinctly below a horizontal line drawn through the middle of the eye.

Mummichog Fundulus heteroclitus. Blunt head. Males with dark and silvery vertical bars on side of body, silvery dots between bars. Dorsal-fin soft rays 10-12. Dark spot on body at dorsal fin origin. 9-10 gill rakers. Jaw teeth in more than a single row. 9 or more scale rows between origin of dorsal fin and origin of anal fin. Dorsal fin origin over or anterior to anal fin origin. Mouth level with, or slightly above, a horizontal line drawn through the middle of the eye. Origin of dorsal fin distinctly anterior to origin of anal fin, more pronounced in males.

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