Species
Browsing 948 species. Use the filters below to narrow down.
Rice Eel or Rice Field Eel
FishMonopterus albus
A land-crossing, air-breathing swamp predator that isn't actually an eel at all.
Ripsaw Catfish
FishMegalodoras uranoscopus
A gentle giant catfish from the Amazon that travels in groups and growls.
Rocket Panchax
FishPseudepiplatys annulatus
A tiny West African killifish with bold bands and surprisingly shy habits.
Rockmover
FishNovaculichthys taeniourus
A reef demolition crew in fish form, juvenile and adult look like different species.
Rosette River Stingray
FishPotamotrygon schroederi
A rare, patterned freshwater ray that demands respect and serious commitment.
Rostratus
FishFossorochromis rostratus
The sand-diving Lake Malawi cichlid that buries itself when spooked.
Rosy Basketmouth
FishCaquetaia spectabilis
A bold Amazonian cichlid that pairs for life and defends its brood fiercely.
Rotpunct Apisto
FishApistogramma alacrina
A pint-sized Colombian dwarf cichlid with a uniquely spotted pectoral fin base.
Round-tailed Paradise Fish
FishMacropodus ocellatus
A cold-hardy labyrinth fish that stays active even under ice.
Royal Clown Loach
FishLeptobotia pellegrini
China's boldly patterned loach needs a group and robust tankmates to thrive.
Royal Featherback
FishChitala blanci
A massive Mekong predator that will outgrow almost any home aquarium.
Ruby Tetra
FishAxelrodi riesei
A tiny red gem from Colombia that rewards patient, species-focused keepers.
Sabanus Bumblebee Goby
FishBrachygobius sabanus
A tiny brackish goby with bold banding and a big territorial attitude.
Saddle Butterflyfish
FishChaetodon ephippium
A boldly patterned butterflyfish with a dramatic dark saddle across its back.
Saddled Bichir
FishPolypterus endlicheri
A prehistoric African predator that breathes air and grows to impressive lengths.
Saddled Bichir
FishPolypterus endlicheri endlicheri
A living fossil that can breathe air and survive out of water.
Sailfin Pimeloid
FishLeiarius marmoratus
A massive schooling catfish with dramatic fins and a nocturnal personality.
Sailfin Tetra
FishCrenuchus spilurus
A solitary little predator with theatrical fin displays and devoted fathering instincts.
Sakaramy Killifish
FishPachypanchax sakaramyi
A montane Malagasy killifish that's gentler than most of its relatives
Salvin's Cichlid
FishCichlasoma salvini
Colorful, compact, and surprisingly ferocious. A Central American cichlid with real attitude.
Salween Barb
FishHampala salweenensis
A rare Salween barb that hunts by suction and needs to be kept in groups.
San Francisco Piranha
FishPygocentrus piraya
The largest piranha, and the one that earns the reputation others borrow.
Sanggau Betta
FishBetta antoni
A soft-water mouthbrooder from Borneo with iridescent blue scales and complex breeding behavior.
Sarasin's Minnow
FishOryzias sarasinorum
A rare Sulawesi ricefish with a truly bizarre egg-carrying trick
Sardine Cichlid
FishCyprichromis leptosoma
A mid-water schooling cichlid from Tanganyika with fascinating lekking behavior.
Sargassum Frogfish
FishHistrio histrio
A master of disguise that drifts the open ocean on floating weed mats.
Sargassum Triggerfish
FishXanthichthys ringens
A long-lived Atlantic trigger that spends its youth adrift in floating seaweed.
Scale-eating Pupfish
FishCyprinodon desquamator
A tiny Bahamian pupfish that makes its living stealing scales from other fish.
Scaleless Killifish
FishAphanius asquamatus
A nearly scaleless relic from a single Turkish lake, built for dedicated keepers.
Scarlet-and-gold Star Coral
CoralBalanophyllia (Balanophyllia) regia
A brilliant cold-water coral that thrives in low light and modest flow.
Scarlet Badis
FishDario dario
Tiny Indian badid with iridescent blue bars and big personality in a nano tank.
Scheeli Killifish
FishFundulopanchax scheeli
A gentle rainforest killifish that rewards patient, thoughtful aquascapers.
Scissortail Barb
FishRasbora rasbora
A large, peaceful schooling rasbora rarely seen outside specialist collections.
Scissortail Dartfish
FishPtereleotris evides
A graceful reef dartfish that hovers in open water and pairs for life.
Scooter Blenny
FishSynchiropus ocellatus
A reef-floor hunter with detailed patterns and a surprisingly long lifespan.
Scott's Wrasse
FishCirrhilabrus scottorum
A brilliantly colored fairy wrasse that rewards patient, experienced reef keepers.