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GVI, juvenile fish, Mexico, identification, marine conservation, volunteer, training tool
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Juvenile Fish ID
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Identifying FeaturesFish FamiliesButterflyfishesDamselfishesParrotfishesWrassesSurgeonfishesSpanish HogfishLong-Spine Sea UrchinBanded Coral Shrimp
Contents
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Identifying Features
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Body Parts
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Markings
Butterfly Fish
Oval Body Shape
Usually travel in pairs
Foureye Butterflyfish
Strong eye-bar
Yellow pelvic and anal fins
Spot at base of caudal fin
Dusky bars across body
Banded Butterflyfish
May have 4 or 2 ocellated spot
Strong bars across body
Spot at base of caudal fin
Damselfish
Bi-Colour Damselfish
Three-spot Damselfish
Saddle spot
Spot on dorsal fin that crosses over to body
Dusky DamselfishElectric blue spots on face
Oscillated spot on dorsal fin
Yellow/orange on top, blue on bottom
Oscillated
saddle spot
Beaugregory Damselfish
Blue on top, Yellow on bottom
Black, small dot only on the dorsal finThought to look like a beauty mark.
Blue lines that Break into small Dots on nape
Cocoa Damselfish
Oscellated blackDot on dorsal finThat runs ontoThe body
Black dot, or “cocoa bean” onCaudal peduncle
Small blue dots on nape
Longfin Damselfish
Blue on topYellow on bottom Black ocellated
Dot on dorsal finThat runs onto body
Long blue lines on nape
Blue Chromis
Parrotfishes
Greenblotch Parrotfish
Bright orange eye
Numerous white stripes
Gets confused with redband parrotfish
Usually red orbrown
Redband Parrotfish
Two white stripes
Dark blotch
Stoplight Parrotfish
White spots across body
Princess ParrotfishLong, slender body
Two bars bordering the tail
Striped ParrotfishLong, slender body
Completely clear tail
Wrasses
Bluehead WrasseBlack spot on dorsal fin
Long, slender body
Yellowhead WrasseLong, slender body
Yellow colouration
Electric blue stripe down entire body
Clown Wrasse
Red spot on nose
Long, slender bodyYellow stripe on both sides of body that meet on the face
White underside
Rainbow WrasseLong, slender body
White stripe above eye
Two black stripes
Slippery Dick
Long, slender body
Black stripe through center of entire body
Surgeonfishes
Blue Tang
Large dorsal and anal fin that meet at caudal fin
Yellow colouration
Large oval body
Ocean SurgeonfishLarge oval body
Adult looks the same as the juvenile
Spanish HogfishBicoloured: dark blue-purple front half and yellow back half
Colour separated diagonally across body
Pointed snout
Fairy Basslet
Bi-Coloured: Dark blue front half and yellow back half
Spot on dorsal fin
Rounded snout
Long, slender body Colour separated vertically across body
Long-Spine Sea Urchin
Banded Coral Shrimp
Long antennae
Red and white bands