Species
Browsing 707 species. Use the filters below to narrow down.
Indian Butterflyfish
FishChaetodon mitratus
A deep-reef butterflyfish from remote Indian Ocean islands, rarely seen in the wild or in tanks.
Indian Glassfish
FishChanda ranga
A ghostly glass fish from Asian rivers, delicate but endlessly fascinating.
Indian Glass Perch
FishParambassis ranga
A living x-ray fish whose transparent body reveals its skeleton and organs.
Indian Ocean Bannerfish
FishHeniochus pleurotaenia
A rarely seen bannerfish that schools in impressive numbers across Indian Ocean reefs.
Isthmian Priapella
FishPriapella intermedia
A sleek Mexican livebearer that leaps clear of the water to catch insects.
Jamaican Killifish
FishCubanichthys pengelleyi
A rare Jamaican killifish with clear-water roots and a reputation for challenging its keeper.
January Tetra
FishHemigrammus hyanuary
A peaceful little tetra that looks like a stretched head-and-tail light fish.
Japanese medaka
FishOryzias latipes
The first vertebrate to mate in space, now a rewarding nano fish for patient keepers.
Jellybean Tetra
FishLepidarchus adonis
A tiny, transparent West African gem that rewards patient, detail-oriented keepers.
Jelly Bean Tetra
FishLadigesia roloffi
A tiny West African gem that thrives in groups and rewards patient keepers.
Julii Cory
FishCorydoras julii
A spotted little catfish that blinks, breathes air, and belongs in every peaceful community.
Julii Cory
FishCorydoras trilineatus
Commonly sold as julii cory, this peaceful armored catfish is a beginner-friendly gem.
Kamaka Rainbowfish
FishMelanotaenia kamaka
A vividly colored rainbowfish with the active personality to match its appearance.
Keyhole Cichlid
FishCleithracara maronii
A gentle, shy cichlid whose camouflage trick is straight out of a nature documentary.
Knob Coral
CoralAstraeosmilia maxima
A bold, knobby coral from the Indo-Pacific suited to intermediate reef keepers.
Knob Coral
CoralDipsastraea helianthoides
A boldly textured brain-style coral with a forgiving personality for growing reef tanks.
Knobnose Whiptail Catfish
FishHemiodontichthys acipenserinus
The only catfish where dad carries the eggs on his lips.
Kole Tang
FishCtenochaetus strigosus
A Hawaiian reef cleaner that scrubs algae with its uniquely bristled teeth.
Kotsovato
FishParetroplus kieneri
A peaceful Malagasy cichlid rarely seen outside specialist collections.
Krieg's Mini Tetra
FishOdontostilbe kriegi
A small, peaceful South American schooler that thrives in the mid-water column.
Kubuna Hardyhead
FishCraterocephalus randi
A slender, active schooler from the clear streams of New Guinea.
Kyburz Tetra
FishPseudochalceus kyburzi
A peaceful Colombian schooler with a nippy streak worth planning around.
L12
FishAncistomus feldbergae
A rock-dwelling Xingu pleco that grazes algae by night and hides by day.
Ladder Loach
FishBotia rostrata
A boldly barred loach with a complex social life and real personality.
Lake Kurumoi Rainbowfish
FishMelanotaenia parva
A rare mountain lake gem that puts on a show at feeding time.
Lake Kutubu Rainbowfish
FishMelanotaenia lacustris
A slow-developing rainbowfish whose true colors take patience to unlock.
Lake Tebera Rainbowfish
FishMelanotaenia herbertaxelrodi
A highland Papua New Guinea gem that rewards patient keepers with vivid color.
Lake Wanam Rainbowfish
FishGlossolepis wanamensis
A critically endangered rainbowfish from a single remote Papua New Guinea lake.
Lamarck's Angelfish
FishGenicanthus lamarck
A planktivorous angelfish with bold dimorphism and an unusually peaceful personality.
Large Finned Lampeye
FishProcatopus nototaenia
A forest stream lampeye that rewards patient, experienced keepers.
Latticed Butterflyfish
FishChaetodon rafflesii
A coral-dependent butterflyfish that reveals its mood through a mysterious dark spot.
Leafy Sea Dragon
FishPhycodurus eques
The leafy sea dragon looks more like drifting seaweed than a fish.
least crayfish
InvertCambarellus diminutus
North America's tiniest crayfish, perfectly sized for a nano setup.
Least Rasbora
FishBoraras urophthalmoides
Tiny, timid, and full of personality when kept in a proper group.
Lemon Coral Goby
FishGobiodon citrinus
A tiny, lemon-yellow goby that lives tucked inside coral branches in the wild.
Lemon meringue wrasse
FishHalichoeres leucoxanthus
A boldly two-toned wrasse with a sunny yellow top and clean white belly.