Search Species
Search for fish species by common or scientific name, or use filters to browse by water type, size, temperament, and difficulty.
Found 665 species
Spring bitterling
Rhodeus suigensis
This is a tiny cool-water bitterling from western Japan, and the females lay eggs inside living mussels using a little tube-like ovipositor. Males flash a subtle blue-green stripe and rosy fins when they are in the mood, which is awesome to watch in a calm, planted setup. It is protected in Japan and rarely seen in the trade, so it is more of a conservation-darling than a casual community fish.
Starhead topminnow
Fundulus dispar
Fundulus dispar is a small native U.S. topminnow associated with vegetated standing waters and quiet pools/backwaters. It is known for reflective "star" spots on the head, and FishBase notes it can be difficult to maintain in aquaria long-term.
Stellate tadpole-goby
Benthophilus stellatus
This is one of those weird little bottom-huggers from the Black Sea/Azov/Caspian region - big head, narrow tail, and a body covered in tiny bony bumps. It spends its time on mud and sand in cooler water, picking at small invertebrates, and it is way more of a coldwater/brackish oddball than a typical tropical aquarium goby.
Stippled studfish
Fundulus bifax
Fundulus bifax is a native Alabama-Georgia studfish with a really slick stippled (spotty) pattern, and breeding males can get some wild blue and red-orange tones. Its also a serious jumper and an absolute rocket when it spooks, so a tight lid is non-negotiable.
Stream catfish
Pseudobagarius macronemus
This is a tiny little akysid stream catfish from eastern Sumatra that spends its time down low, poking around the bottom (benthopelagic). The weird part with this one is the name - a lot of sources treat it as Pseudobagarius macronema, and you will see it sold or listed under either spelling.
Striated blenny
Hypsoblennius striatus
Hypsoblennius striatus (striated blenny) is a small combtooth blenny from the eastern-central Pacific (around Costa Rica and Panama). Like other blennies, it is associated with shallow rocky/reef habitats, and its eggs are demersal and adhesive, attached to the substrate.
Striped blenny
Chasmodes bosquianus
This is the little oyster-bed blenny from the US Atlantic coast - it hangs out on hard bottom and in shell rubble, peeking from crevices like a tiny grumpy bouncer. In an aquarium it tends to perch, dart, and investigate everything, and it can get pretty territorial if you try to cram it in tight with other blennies. The big “gotcha” is people treat it like a tropical reef blenny, but its natural temps run cool to mild and it shows up in brackish estuaries too.
Striped clingfish
Derilissus vittiger
This is a tiny little Western Atlantic clingfish that lives down on deeper reefs and clings to hard stuff with its belly suction disk. Its whole vibe is cryptic and hidey, more like a micro-predator you would spot while peering into reef rockwork than a fish that cruises around the tank. Honestly, it is super cool biologically, but it is not a realistic home-aquarium species for most people.
Striped goby
Gobius vittatus
A small Mediterranean marine goby found mainly on coralligenous/rocky bottoms (often ~15-50+ m), known for its pale body with a dark lateral stripe; it is shy and retreats quickly to crevices. In aquaria it is a cool-water Mediterranean species rather than a typical tropical reef goby.
Striped Krib / Nigerian Red Krib
Pelvicachromis taeniatus
P. taeniatus is one of those West African dwarf cichlids that'll act totally chill most of the time, then flip the switch into "serious cave owner" the moment it wants to spawn. The fun part is the local color forms ("Nigeria Red", "Moliwe", etc.) and the pair-bonding-when they settle in, you really get to watch a little cichlid soap opera play out around their cave.
Stripe-face Calamiana
Eugnathogobius mindora
This is a teeny-tiny estuary goby that hangs out on the bottom in mangrove and tidal creek habitats. Its little striped face and speckly fins are the main "wow" factor, but the real charm is watching it perch and scoot around like a mini dragon. Not something you see in the aquarium trade much, and it is easy to mis-ID as other small brackish gobies.
Stripefin ronquil
Rathbunella alleni
Rathbunella alleni is a little bottom-hugging coastal marine fish from California down into Baja, the kind that spends its time tucked around structure and cruising the seafloor. Its claim to fame is that slick blue stripe running along the anal fin (especially noticeable on males), plus that blenny-ish, prickleback vibe that makes it look like it belongs in a tidepool documentary.