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Species

Browsing 2,796 species. Use the filters below to narrow down.

Opsarius ardens

Opsarius ardens

Fish

Barilius ardens

A fast-moving Western Ghats minnow that needs space, speed, and bold companions.

Oranda Goldfish

Oranda Goldfish

Fish

Carassius auratus var. oranda

The velvet-capped fancy goldfish that rewards patient, attentive keeping.

Orange Ball Anemone

Orange Ball Anemone

Coral

Pseudocorynactis caribbeorum

A nocturnal Caribbean predator with sticky orange-tipped tentacles that can snag small fish.

Orange Chromide

Orange Chromide

Fish

Etroplus maculatus

The only cichlid native to India, with a fascinating cleaning-fish side hustle.

Orange Cup Coral

Orange Cup Coral

Coral

Balanophyllia (Balanophyllia) elegans

A vivid cold-water coral that thrives in the shade where most corals fail.

Orange Cup Coral

Orange Cup Coral

Coral

Tubastraea columnata

A bold, non-photosynthetic coral that rewards patient target feeders with vivid blooms.

Orange Cup Coral

Orange Cup Coral

Coral

Tubastraea grandidentata

A non-photosynthetic branching coral that thrives in dim, current-swept reef spots.

Orange dwarf toothcarp

Orange dwarf toothcarp

Fish

Neoheterandria elegans

A tiny Colombian livebearer with a fascinating near-mammalian reproductive twist.

Orange Encrusting Anemone

Orange Encrusting Anemone

Coral

Epizoanthus scotinus

A cold-water Pacific zoanthid that brings bold orange color to cooler reef tanks.

Orangefin Anemonefish

Orangefin Anemonefish

Fish

Amphiprion chrysopterus

A large, bold anemonefish from the wide Pacific with serious territorial attitude.

Orange-fin Barb

Orange-fin Barb

Fish

Barbus eutaenia

A sleek African barb from fast, rocky streams that rewards patient keepers.

Orangefin Tetra

Orangefin Tetra

Fish

Bryconops affinis

A restless, fast-moving shoaler from the Guiana Shield's coastal streams.

Orangeflossen

Orangeflossen

Fish

Laetacara fulvipinnis

A tiny blackwater cichlid with warm-toned fins and a gentle personality.

Orange Head

Orange Head

Fish

Geophagus sp. "Orange Head"

A vividly capped cichlid that rewards patient keepers with fascinating mouthbrooding family life.

Orange Poso Rabbit Snail

Orange Poso Rabbit Snail

Invert

Tylomelania gemmifera

A slow-moving, long-lived freshwater snail with a face only a hobbyist could love.

Orangespine Unicornfish

Orangespine Unicornfish

Fish

Naso elegans

A bold reef grazer with vivid orange tail spines and a distinctly regal profile.

Orangespot Surgeonfish

Orangespot Surgeonfish

Fish

Acanthurus olivaceus

A bold orange shoulder-stripe makes this reef surgeon impossible to mistake.

Orangestriped Triggerfish

Orangestriped Triggerfish

Fish

Balistapus undulatus

One of the reef's most aggressive personalities packed into a boldly patterned body.

Orange Sun Coral

Orange Sun Coral

Coral

Tubastraea megalostoma

A bold, non-photosynthetic coral that thrives in low light and rewards dedicated feeders.

Orange Sun Coral

Orange Sun Coral

Coral

Tubastraea ramosa

A brilliant non-photosynthetic branching coral that thrives in the dark.

Orange Tree Coral

Orange Tree Coral

Coral

Dendrophyllia ramea

A branching azooxanthellate coral that thrives in dim, current-swept Atlantic waters.

Orchid Dottyback

Orchid Dottyback

Fish

Pseudochromis fridmani

A bold little Red Sea endemic that punches well above its weight.

Orchid Island Goby

Orchid Island Goby

Fish

Rhinogobius lanyuensis

A tiny island goby from one of Taiwan's most remote corners.

Orinoco Eartheater

Orinoco Eartheater

Fish

Biotodoma wavrini

A slender eartheater that thrives in groups and rewards patient, experienced keepers.

Orinoco sailfin catfish

Orinoco sailfin catfish

Fish

Pterygoplichthys multiradiatus

A dinosaur-sized algae grazer built for decades of service in large tanks.

Ornate Bichir

Ornate Bichir

Fish

Polypterus ornatipinnis

An ancient, armored predator that breathes air and prowls the night.

Ornate Paradisefish

Ornate Paradisefish

Fish

Malpulutta kretseri

A rare Sri Lankan gem that deserves a species tank all to itself.

Ornate rainbowfish

Ornate rainbowfish

Fish

Rhadinocentrus ornatus

A tiny Australian rainbowfish from wild, tea-stained wallum streams.

Oscar

Oscar

Fish

Astronotus ocellatus

The cichlid that recognizes your face and rearranges its own tank.

Otocinclus

Otocinclus

Fish

Otocinclus vittatus

Tiny algae-grazing catfish that plasters itself to glass and plants alike.

Otocinclus Catfish (Tank-Bred)

Otocinclus Catfish (Tank-Bred)

Fish

Otocinclus macrospilus

The most commonly sold oto, fragile at first but rewarding once settled.

Otocinclus cocama

Otocinclus cocama

Fish

A tiny Peruvian algae grazer with bold, zebra-like blotches and a gentle disposition.

Oval Mushroom Coral

Oval Mushroom Coral

Coral

Lobactis scutaria

A hardy, low-demand coral that brings bold texture to any reef.

Oyapock Cory

Oyapock Cory

Fish

Corydoras condiscipulus

A long-lived Oyapock armored catfish that breathes air and blinks its eyes.

Oyapock Eartheater

Oyapock Eartheater

Fish

Geophagus camopiensis

A rarely seen eartheater with elaborate mouthbrooding behavior and real personality.

Pacific Double-saddle Butterflyfish

Pacific Double-saddle Butterflyfish

Fish

Chaetodon ulietensis

A boldly patterned butterflyfish that pairs for life in the wild.