Mooneye
  • Side view adult.
  • Side view adult.
  • Side view adult.
  • Top view adult.
  • Bottom view adult.
  • Head-on view adult.
  • Close-up flank.
  • Close-up head.
  • Close-up mouth and snout.
  • Close-up tail.
  • Close-up dorsal fin.
  • Close-up anal fin.
  • Close-up pectoral fin.
  • Close-up pelvic fin.
  • Close-up underside: The ventral kell is fleshy.
  • Close-up dorsal fin; There are 9-10 dorsal rays.
  • Notice that the dorsal fin origin is ahead or even of the anal fin origin; the profile is rounded and the anal fin is long.
  • Close-up underside of head: Notice the presence of agular membrane and the overlapping gill cover.
  • Close-up head: Notice that the maxillary extends past the middle of the eye.
  • Alternative view of the dorsal area.
  • Alternative view of the tail area.
  • Alternate side view of an adult.
  • View of the gill rakers.
  • View of the ventral keel.
DescriptionSimilar Species
Family
Mooneyes (Hiodontidae)
Body
Mouth and Snout: The mouth is terminal and obliquely angled upwards with numerous small teeth. Mouth extends to the middle or back of the eye. There are 15-17 relatively short gill rakers. Teeth on the tongue are fairly obvious, and the eye is relatively large. No barbels. Body Pattern: Solid to silvery or golden. No markings on body or fins. Obvious numerous cycloid scales. Body Shape: Laterally compressed. Typical adult size is 200-300 mm TL, with a maximum of about 475 mm (12 inches).
Fins
Forked tail. One single dorsal fin with 10-14 rays and no spines, located on the posterior portion of the back. The anal fin is somewhat elongated (length of base much longer than shortest ray) and has 26-29 rays. The pelvic fins are abdominal with axillary processes and originate well in advance of the origin of the dorsal fin. No adipose fin. The origin of dorsal fin is clearly in advance of the origin of the anal fin.
Distinguishing Characteristics
Dorsal fin with 11-12 rays, origin well forward of origin of anal fin. Teeth in mouth and on tongue; maxillary ends short of or extends to middle of eye, large eye. Dorsal profile between dorsal fin and head more rounded. Gill slits extend far forward ventrally, with the two gill covers overlapping posteriorly and covered by gular membrane anteriorly. 52-57 lateral line scales. A fleshy unscaled keel extends from the anus to the pelvic fins. See also similar species information.
Breeding Adults
Same.
Juveniles
The body and fins are silver with no obvious markings.
Hybrids
None known from Wisconsin.
Compare Similar Species
Keel
GoldeyeVentral keel from vent forward to isthmus (gill area)
MooneyeVentral fleshy keel from vent forward to pelvic fins
Dorsal Fin
Goldeye9-10 rays and origin even with or slightly behind origin of anal fin
Mooneye11-12 rays and origin well forward of origin of anal fin
Axillary Process on Pelvic Fin
GoldeyePresent
MooneyePresent
Maxillary
GoldeyeExtends beyond middle of eye
MooneyeEnds short of or extends to middle of eye
Mouth/Teeth
GoldeyeTeeth in mouth and on tongue
MooneyeTeeth in mouth and on tongue
Dorsal Profile Between Dorsal Fin and Head
GoldeyeLargely flat, especially in larger specimens
MooneyeMore rounded
Lateral Line
GoldeyePresent
MooneyePresent
Gill Slits
GoldeyeExtend far forward ventrally with the two gill covers overlapping posteriorly and covered by gular membrane anteriorly
MooneyeExtend far forward ventrally with the two gill covers overlapping posteriorly and covered by gular membrane anteriorly
Anal Fin
GoldeyeLong
MooneyeLong with length of base much longer than shortest ray
Similarity Index
GoldeyeVery similar
MooneyeN/A
Comments
GoldeyeSee 1st row.
MooneyeModerately similar to shad family (Alosa, Dorosoma) and deep-bodied shiners of the minnow family (Cyprinella, Luxlilus, Notemigonus, Scardinius)
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