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Shoal & Stem

Flora & Fauna

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

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.

snail
easy

Margarita Snail

Margarites pupillus

snailsaltwater

Small, cold-water snail — an exceptional algae grazer often used in reef tanks as clean-up crew. Prefers cooler temperatures so it's ideal for FOWLR tanks or tanks below 74°F. Peaceful and prolific.

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.

coral
easy

Maze Brain Coral

Platygyra daedalea

coralsaltwater

Iconic labyrinthine-patterned brain coral — the classic reef centrepiece. Hardy, slow-growing, and tolerant of moderate conditions. Green fluorescent under actinic lighting. A timeless display piece.

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.

coral
easy

Mushroom Coral

Actinodiscus spp.

coralsaltwater

Mushroom corals (discosoma) are flat, fleshy soft corals available in a huge range of colours including green, blue, red, and metallic. They are excellent beginner corals, requiring low to medium light and tolerating nutrient-rich water better than SPS corals.

snail
easy

Nassarius Snail

Nassarius sp.

snailsaltwater

Small sand-dwelling scavenger that buries itself and erupts from the substrate to feed on meaty detritus. Excellent sand bed aerator and clean-up crew staple.

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.

coral
easy

Open Brain Coral

Trachyphyllia geoffroyi

coralsaltwater

Free-living LPS with dramatic maze-like ridges and vivid colours — green, red, blue, and multicolour morphs. Placed directly on sand; inflates impressively at night to feed. One of the most beautiful reef centrepieces.

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.

coral
easy

Palythoa

Palythoa grandis

coralsaltwater

Large-polyped cousins of Zoanthids — drab tan-brown in the wild but cultivated morphs include greens, yellows, and reds. Hardy and fast-spreading. Contain palytoxin — handle with gloves. Excellent beginner coral.

shrimp
easy

Peppermint Shrimp

Lysmata wurdemanni

shrimpsaltwater

Translucent shrimp with red stripes. Famous for eating Aiptasia pest anemones. An essential pest controller for reef tanks.

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.

shrimp
easy

Pistol Shrimp

Alpheus randalli

shrimpsaltwater

Famous for its symbiosis with watchman gobies — the shrimp digs a burrow and the goby guards the entrance. Pairs perfectly with Yellow Watchman or Randall's Pistol Goby. Produces a loud snapping sound.

coral
easy

Pulsing Xenia

Xenia spp.

coralsaltwater

Pulsing xenia is one of the most fascinating soft corals, rhythmically opening and closing its feathery polyps in a hypnotic pulse. It grows rapidly and can spread across rockwork quickly, so placement should be deliberate. Thrives in stable reef conditions.

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.

algae
easy

Red Gracilaria

Gracilaria sp.

algaesaltwater

Bushy red-to-burgundy macroalgae prized as live food for herbivorous fish — tangs, rabbitfish, and urchins graze on it enthusiastically. Also an excellent nutrient exporter in refugia. Tumbles well under flow and tolerates a wide range of conditions.

coral
easy

Ricordea Florida

Ricordea florida

coralsaltwater

Colourful mushroom coral covered in bumpy vesicles in shades of green, orange, and blue. Slower-growing than regular mushrooms. Hardy and great for beginners.

coral
easy

Ricordea Yuma

Ricordea yuma

coralsaltwater

The Indo-Pacific cousin of Ricordea florida — single-polyp mushroom with vivid nodular texture. Some of the most wildly colourful colourations in the hobby: electric blue, neon orange, purple, and multicolour. Highly collectible.

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.

algae
easy

Sea Lettuce

Ulva lactuca

algaesaltwater

Bright green, tissue-thin sheets of macroalgae familiar on coastlines worldwide. Fast-growing nutrient exporter and a relished food for tangs, urchins, and rabbitfish. Tolerates a very wide temperature and salinity range. Can become weedy if not harvested — keep export-focused.

shrimp
easy

Sexy Shrimp

Thor amboinensis

shrimpsaltwater

Tiny brown-orange shrimp with white polka-dots and a characteristic upward tail-bob dance. Commonly lives among anemones and Zoanthids in groups. One of the most endearing nano reef invertebrates.

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.

coral
easy

Star Polyps

Briareum spp.

coralsaltwater

Green star polyps (GSP) are one of the most popular beginner corals, forming rapid-spreading mats of bright green polyps. They are extremely hardy, tolerating a wide range of conditions. Their fast growth can become invasive, so placement should be considered carefully.

snail
easy

Stomatella Snail

Stomatella varia

snailsaltwater

Fast-moving, flat-shelled snail that looks more like a slug. Reproduces readily in reef tanks, forming beneficial colonies that graze film algae and coralline. Fish generally ignore them; a great hitchhiker species.

fish
easy

Tailspot Blenny

Ecsenius stigmatura

fishsaltwater

One of the most popular reef blennies — mottled tan with a characteristic black tail spot and expressive eyes. Grazes on algae and is generally reef-safe with corals. Full of personality.

snail
easy

Tectus Snail

Tectus fenestratus

snailsaltwater

Larger turban-shaped snail with a heavily ridged shell. A workhorse algae grazer on rockwork and glass — handles tougher hair algae that smaller snails cannot manage. Peaceful and active.

coral
easy

Toadstool Coral

Sarcophyton trocheliophorum

coralsaltwater

The toadstool coral is a large, distinctive soft coral with a stalk and a broad, ruffled cap covered in polyps. One of the most beginner-friendly reef corals, it tolerates a wide range of conditions. It periodically closes up and sheds a waxy film — normal behaviour.

fish
easy

Tomato Clownfish

Amphiprion frenatus

fishsaltwater

Bold, tomato-red with a single white cheek stripe. Hardy and beginner-friendly, closely related to the Ocellaris. Pairs readily with bubble-tip anemones in captivity.

snail
easy

Trochus Snail

Trochus sp.

snailsaltwater

Conical-shelled snail that rights itself when knocked over — unlike turbo snails. Efficient algae grazer on glass and rock. Reef-safe and long-lived.

fish
easy

True Percula Clownfish

Amphiprion percula

fishsaltwater

Slightly more vibrant coloring than its ocellaris cousin. Pairs beautifully with Bubbletip or Magnificent anemones. Very popular reef fish.