Solitary jawfish Solomon’s lanternbelly Solor jawfish Solor triplefin Somali butterflyfish Somali grouper Somali sandperch Somalia catfish Somalia glass catfish Somalian blind barb Somalian cavefish Somalian giant catfish Somalian sand diver Somalian toadfish Someren's suckermouth Sompat grunt Sona sea catfish Sonora blenny Sonora chub Sonora clingfish Sonora goby Sonora scorpionfish Sonora sucker Sonora topminnow Sonoyta pupfish Soot-tail Dottyback Sooty cusk-eel Sooty darter Sooty eel Sooty grunter Sooty sand eel Sooty skate Sooty snailfish Soragoi Koi Sordid rubberlip Soringa sillago Sorong rainbowfish Sostra's pygmygoby Soto la Marina shiner South African mullet South African Sand Diver South African thorny flathead South African zebra sole South American catfish South American freshwater stingray South American lungfish South American pilchard South American silver croaker South American silver porgy South Brazilian skate