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            Seychelles Butterflyfish
(Chaetodon madagascariensis)
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            Sharp Nosed Weever Blenny
(Parapercis hexophthalma)
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            Short Tail Bristletooth Tang
(Ctenochaetus cyanocheilus)
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            Shortnose Pufferfish
(Canthigaster epilampra)
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            Sidespot Wrasse, Male
(Pseudojuloides mesostigma)
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            Silverspot Squirrelfish
(Sargocentron caudimaculatum)
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            Singular Bannerfish
(Heniochus singularis)
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            Six Line Wrasse
(Pseudocheilinus hexataenia)
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            Sixbar Angelfish, Adult
(Pomacanthus sexstriatus)
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            Skunk Clownfish
(Amphiprion akallopisos)
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            Sleeper Banded Goby
(Amblygobius phalaena)
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            Sleeper Blue Dot Goby
(Valenciennea sexguttata)
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            Sleeper Gold Head Goby
(Valenciennea strigata)
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            Sleeper Railway Glider Goby
(Valenciennea helsdingenii)
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            Sleeper Striped Goby
(Valenciennea longipinnis)
 - 
            
            Slingjaw Wrasse
(Epibulus insidiator)
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            Smalltail Pencil Wrasse, Male
(Pseudojuloides polackorum)
 - 
            
            Snooty Wrasse
(Cheilinus oxycephalus)
 - 
            
            Snowflake Moray Eel
(Echidna nebulosa)
 - 
            
            Sohal Tang
(Acanthurus sohal)
 - 
            
            Somali Butterflyfish
(Chaetodon leucopleura)
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            Speckled Butterflyfish
(Chaetodon citrinellus)
 - 
            
            Sphynx Goby
(Amblygobius sphynx)
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            Spider Eye Pufferfish
(Canthigaster amboinensis)
 - 
            
            Spinecheek Goby
(Oplopomus oplopomus)
 - 
            
            Spiny Head Cardinalfish
(Apogon urostigma)
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            Spotband Butterflyfish
(Chaetodon punctatofasciatus)
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            Spotbreast Angelfish, Male
(Genicanthus melanospilos)
 - 
            
            Spotfin Antennata Lionfish
(Pterois antennata)
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            Spotted Boxfish, Female
(Ostracion meleagris, female)