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Shoal & Stem

Flora & Fauna

673 entries — care guides, placement tips, and notes from the community

fish
easy

Banggai Cardinalfish

Pterapogon kauderni

fishsaltwater

Elegant black-and-silver with distinctive elongated fins and bold stripes. A mouthbrooder — the male incubates eggs in his mouth until hatching. One of the few marine fish regularly bred in home aquaria.

fish
medium

Blue Tang

Paracanthurus hepatus

fishsaltwater

Striking royal blue fish with a yellow tail. Active swimmer requiring large tanks. Prone to ich, so quarantine is recommended.

fish
easy

Coral Beauty Angelfish

Centropyge bispinosa

fishsaltwater

Deep blue body with orange-yellow sides and purple highlights. Hardiest of the dwarf angels. Generally reef-safe but may nip soft corals.

fish
hard

Emperor Angelfish

Pomacanthus imperator

fishsaltwater

Majestic large angelfish with electric blue-and-yellow horizontal stripes. Juveniles are black with white rings. Not reef-safe. Requires expert care and very large tanks.

fish
easy

Firefish Goby

Nemateleotris magnifica

fishsaltwater

Elegant dartfish with a fiery orange-red tail and white-to-yellow body. Shy but beautiful. Tends to jump so a tight-fitting lid is essential.

fish
medium

Flame Angelfish

Centropyge loricula

fishsaltwater

Vivid red-orange dwarf angelfish with black vertical bars. One of the most popular dwarf angels. May nip at corals; monitor in reef tanks.

fish
easy

Flame Hawkfish

Neocirrhites armatus

fishsaltwater

Vivid red with black dorsal markings and outline — perches atop gorgonians and Acropora waiting to ambush prey. Completely reef-safe with corals but will eat small shrimp. Charismatic and bold.

fish
easy

Foxface Rabbitfish

Siganus vulpinus

fishsaltwater

Bold yellow body with intricate brown-and-white facial patterning. Has venomous spines so handle carefully. Outstanding algae and nuisance weed grazer.

fish
easy

Green Chromis

Chromis viridis

fishsaltwater

The quintessential schooling reef fish — shimmering apple-green in open water above Acropora. Incredibly hardy and peaceful. Best kept in groups of 6+ for the most natural look.

fish
medium

Harlequin Tusk

Choerodon fasciatus

fishsaltwater

Bold orange-and-white banded wrasse with vivid blue teeth. Impressive predator fish for FOWLR tanks. Australian specimens (red-orange) are more vibrant than Indo-Pacific.

fish
easy

Kole Tang

Ctenochaetus strigosus

fishsaltwater

Brown tang covered with fine yellow-orange spots. Excellent detritivore and algae grazer. More peaceful and compact than most tangs. Great reef fish.

fish
easy

Lawnmower Blenny

Salarias fasciatus

fishsaltwater

The go-to algae control fish for reef tanks — relentlessly grazes film algae and hair algae off rocks and glass. Camouflaged brown-grey with warty skin and charismatic perching behaviour.

fish
easy

Longnose Hawkfish

Oxycirrhites typus

fishsaltwater

Instantly recognisable by its elongated snout and white body with red grid pattern. Perches in gorgonian sea fans and black coral, propping itself on its fins. Bold and long-lived in captivity.

fish
easy

Lubbock's Fairy Wrasse

Cirrhilabrus lubbocki

fishsaltwater

Strikingly colourful — males flash vivid red, orange, and yellow with iridescent highlights during display. Peaceful and active; best kept as one male with several females. A jewel of the mid-water column.

fish
medium

Lyretail Anthias

Pseudanthias squamipinnis

fishsaltwater

One of the most colourful reef fish — females orange-pink, males dazzling magenta-purple with elongated tail filaments. Best kept in a harem (one male, multiple females) with strong flow and frequent feeding.

fish
expert

Mandarin Dragonet

Synchiropus splendidus

fishsaltwater

Arguably the most beautiful fish in the hobby. Requires a mature reef with abundant copepods. Not for beginners. Will starve if not given live food.

fish
easy

Maroon Clownfish

Premnas biaculeatus

fishsaltwater

The largest clownfish species, maroon-red with bold white stripes. Highly aggressive — best kept as a single specimen or bonded pair. One of the most striking reef fish available.

fish
easy

Melanurus Wrasse

Halichoeres melanurus

fishsaltwater

Dazzling rainbow colouration — females green-blue, males sporting a vivid magenta-and-green pattern. A sand-diver that buries to sleep. Natural predator of flatworms and pyramid snails.

fish
easy

Midas Blenny

Ecsenius midas

fishsaltwater

Brilliant golden-yellow with a flowing, eel-like body. Often mimics Lyretail Anthias in colour. Perches on rockwork and darts into crevices when startled — reef-safe and entertaining to watch.

fish
medium

Mystery Wrasse

Pseudocheilinus ocellatus

fishsaltwater

Rare and stunning — white with bold yellow-outlined spots and red-tipped fins. A cryptic wrasse that stays hidden in the rockwork. Highly sought-after collector fish that commands a premium.

fish
medium

Naso Tang

Naso lituratus

fishsaltwater

Elegant tang with a characteristic orange-tipped rostrum, blue-trimmed fins, and long tail streamers in mature males. A graceful, active swimmer that needs a large tank. Excellent algae control.

fish
easy

Neon Goby

Elacatinus oceanops

fishsaltwater

Tiny electric-blue-striped goby renowned as a cleaner fish — will pick parasites from larger tank mates. Ideal for nano reefs. The Caribbean's answer to the cleaner wrasse.

fish
easy

Ocellaris Clownfish

Amphiprion ocellaris

fishsaltwater

The iconic clownfish made famous by Finding Nemo. Hardy, peaceful, and symbiotic with anemones. Excellent beginner saltwater fish.

fish
easy

Orchid Dottyback

Pseudochromis fridmani

fishsaltwater

Vivid orchid-purple throughout — one of the most coveted nano reef fish. A Red Sea endemic that is now tank-bred widely. Bold personality for its size; can be aggressive to smaller fish.

fish
easy

Pajama Cardinalfish

Sphaeramia nematoptera

fishsaltwater

Unmistakable with its yellow head, dark mid-band and polka-dotted orange rear — like a fish in pyjamas. Nocturnal schooler that hovers in groups near branching corals. Very peaceful and reef-safe.

fish
easy

Pink Skunk Clownfish

Amphiprion perideraion

fishsaltwater

Pale pink-orange with a single white dorsal stripe and cheek bar. One of the smallest and most peaceful clownfish — ideal for nano reef tanks alongside Magnificent Anemones.

fish
medium

Porcupine Puffer

Diodon holocanthus

fishsaltwater

Endearing and personable puffer with large eyes and a round body covered in spines. Will eat inverts — FOWLR only. Develops a real personality and recognises its keeper.

fish
hard

Powder Blue Tang

Acanthurus leucosternon

fishsaltwater

One of the most beautiful tangs with a powder-blue body, yellow dorsal fin and black mask. Prone to ich and disease — best for experienced reef keepers.

fish
easy

Purple Firefish

Nemateleotris decora

fishsaltwater

One of the most visually striking nano reef fish — white to yellow body fading into vivid purple-magenta. Peaceful and reef-safe; will jump, so a tight lid is essential.

fish
medium

Purple Tang

Zebrasoma xanthurum

fishsaltwater

Deep violet-purple with a bright yellow tail — one of the most desired tang species. A Red Sea endemic, now tank-raised. Aggressive toward other tangs so introduce with care.

fish
expert

Regal Angelfish

Pygoplites diacanthus

fishsaltwater

Breathtakingly beautiful with alternating white-and-orange bars. Notoriously difficult to feed in captivity. Red Sea specimens generally adapt better than Pacific ones.

fish
easy

Royal Gramma

Gramma loreto

fishsaltwater

Arguably the most striking Caribbean reef fish — front half vivid purple, rear half bright yellow. Hardy, peaceful, and reef-safe. Tends to hang upside-down under ledges mimicking its cave habitat.

fish
easy

Scissortail Dartfish

Ptereleotris evides

fishsaltwater

Slender, schooling dartfish with a distinctive forked tail and blue-grey body. Best kept in pairs or small groups; will share a burrow. Reef-safe and active in the mid-water column.

fish
easy

Scopas Tang

Zebrasoma scopas

fishsaltwater

Elegant, understated tang ranging from brown to blue-grey with fine markings. Peaceful and hardy. Excellent algae grazer and reef-safe.

fish
easy

Six Line Wrasse

Pseudocheilinus hexataenia

fishsaltwater

Active and colourful wrasse with six horizontal blue stripes. Pest controller — eats flatworms and small pests. Can be territorial with similar species.

fish
medium

Snowflake Moray

Echidna nebulosa

fishsaltwater

Spectacular black-and-white patterned eel. One of the most reef-compatible morays as it eats crustaceans rather than fish. Needs a very secure lid.