Bloater
  • 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 of head: Notice that there is light to no pigment on chin.
  • There are 37-48 (usually 41-44) medium-size gill rakers.
  • Close-up pelvic fins: Notice medium pelvic fin length and no pigment.
  • The bloater is relatively deep body with the deepest part anterior to dorsal origin; the belly is sharply rounded.
  • The body is relatively oval in cross section.
  • Close-up mouth: Notice terminal mouth, light pigment and eye diameter; lower jaw is slightly shorter than upper jaw; the snout is pointed.
  • Close-up caudal region: Notice presence of adipose fin.
  • Juveniles are similar to adults.
  • Alternate side view.
  • Alternate side view of two specimens.
  • Alternate side view of life fish in aquarium.
  • Comparison lake whitefish (top), bloater (bottom): Notice the snout shape differences.
  • Comparison lake whitefish (top), bloater (bottom): Notice the snout shape differences.
  • Hybrid of cisco/lake herring X bloater (?): Notice intermediate body shapes.
  • Hybrid bloater X kiyi (?): Notice medium number and length of gill rakers.
  • Hybrid bloater X kiyi (?): Notice medium length of pelvic fins.
  • Hybrid of cisco/lake herring X bloater (?): Notice intermediate body shape.
  • Hybrid cisco/lake herring X bloater (?): Notice medium length of pelvic fins.
  • Hybrid of bloater X kiyi (?): Notice intermediate body shape.
  • Hybrid bloater X kiyi (?): Notice intermediate body shape.
  • Hybrid bloater X kiyi (?): Notice large eye and dark pigment.
  • Hybrid of cisco/lake herring X bloater (?): Notice intermediate number and length of gill rakers.
  • Hybrid of cisco/lake herring X bloater (?): Notice intermediate length of jaw.
DescriptionSimilar Species
Family
Trouts (Salmonidae)
Body
Mouth and snout: Terminal, oblique, a few minute teeth on jaws. No barbels. Body patterning, color, and scales: Solid color. Body color generally silvery, grading from brown, bronze or greenish on the back to silvery on the flanks to cream on the belly. 60-84 cycloid lateral line scales, usually 67-77. Fins without spots. Body shape and size: Body fusiform and deep bodied; oval in cross section. Typically 200-250 mm (8-10 in) TL; maximum about 366 mm (14.5 in).
Fins
Tail, dorsal and other fins: Forked tail. Single dorsal no spines and 7-10 principal rays, usually 9-10. Pelvic fins abdominal with axillary process. Adipose fin present. Anal fin with 10-13 principal rays, usually 11.
Distinguishing Characteristics
The bloater can be distinguished by its terminal mouth, by its presence of an adipose fin, and by its presence of an axillary process of the pelvic fin. See also similar species information.
Breeding Adults
Males with numerous small tubercles on body, females with fewer.
Juveniles
Similar to adults.
Hybrids
Cisco/lLake herring X Bloater (photos); Bloater X Kiyi(?) (photos).
Compare Similar Species
Snout Shape and Pigment
BloaterUsually pointed, rarely blunt; light or moderate pigment
CiscoUsually pointed, rarely blunt; moderate pigment
Cisco, BlackfinUsually pointed, rarely blunt; dark pigment
Cisco, DeepwaterUsually pointed, sometimes blunt; moderate pigment
Cisco, ShortjawUsually blunt (angled), rarely pointed; moderate pigment
Cisco, ShortnoseUsually pointed, rarely blunt; moderate or dark pigment
KiyiUsually pointed, sometimes blunt; dark pigment
Chin Pigment
BloaterLight or moderate
CiscoLight or moderate
Cisco, BlackfinModerate
Cisco, DeepwaterLight
Cisco, ShortjawLight
Cisco, ShortnoseModerate
KiyiLight or moderate
Length of Upper Jaw Relative to Lower Jaw
BloaterUsually less, rarely equal
CiscoUsually equal, sometimes less, rarely more
Cisco, BlackfinUsually equal
Cisco, DeepwaterUsually equal
Cisco, ShortjawUsually more, rarely equal
Cisco, ShortnoseUsually equal, sometimes less
KiyiUsually less, rarely equal
Pelvic Fin Length and Pigment
BloaterMedium; no or light pigment
CiscoShort to medium; no or light pigment
Cisco, BlackfinUsually medium, rarely long; dark pigment
Cisco, DeepwaterMedium; no or light pigment
Cisco, ShortjawShort to medium; no or light pigment
Cisco, ShortnoseShort; no or light pigment
KiyiLong; no or light pigment
Eye Diameter
BloaterModerate
CiscoModerate
Cisco, BlackfinModerate
Cisco, DeepwaterModerate
Cisco, ShortjawModerate
Cisco, ShortnoseModerate to large
KiyiLarge
Gill Raker Number and Length
Bloater37-48, usually 41-44; usually medium, rarely short or long
Cisco41-55, usually 46-55; usually long, rarely medium
Cisco, Blackfin41-52, usually 46-50; long
Cisco, Deepwater26-36, usually 27-32; short
Cisco, Shortjaw35-44, usually 38-42; usually short, rarely medium
Cisco, Shortnose30-43, usually 34-38; short
Kiyi34-45, usually 36-41; usually medium, rarely long
Body Depth and Shape
BloaterDeep bodied, oval in cross-section, deepest part of body anterior to dorsal fin, sharply rounded belly
CiscoRelatively elongated, some fsh almost round in cross-section, deepest part of body usually near origin of dorsal fin, gently rounded belly
Cisco, BlackfinDeep bodied, oval in cross-section, deepest part of body anterior to dorsal fin, sharply rounded belly
Cisco, DeepwaterModerately deep bodied, oval in cross-section, deepest part of body just anterior to dorsal fin, moderately rounded belly
Cisco, ShortjawModerately deep bodied, oval in cross-section, deepest part of body just anterior to dorsal fin, moderately rounded belly
Cisco, ShortnoseModerately deep bodied, oval in cross-section, deepest part of body just anterior to dorsal fin, moderately rounded belly
KiyiRelatively elongated, oval in cross-section, deepest part of body usually near origin of dorsal fin, gently rounded belly
Similarity Index
BloaterN/A
CiscoVery similar
Cisco, BlackfinVery similar
Cisco, DeepwaterVery similar
Cisco, ShortjawVery similar
Cisco, ShortnoseVery similar
KiyiVery similar
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