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Shoal & Stem

Flora & Fauna

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

coral
easy

Blastomussa

Blastomussa wellsi

coralsaltwater

Blastomussa are large-polyp stony corals with fleshy, round polyps that inflate dramatically at night. They are tolerant of lower light and moderate nutrients, making them a good LPS choice for mid-level placement. They feed readily on meaty foods at night.

fish
easy

Bleeding Heart Tetra

Hyphessobrycon erythrostigma

fishfreshwater

Named for the vivid red spot on the chest that resembles a bleeding heart, this is one of the larger and more impressive tetras. Males develop long, flowing dorsal and anal fins and a deeper body as they mature. Despite its size, it is a peaceful community fish that looks spectacular in large schools in planted or natural-style aquariums.

fish
easy

Blind Cave Tetra

Astyanax mexicanus

fishfreshwater

Eyeless cave-dwelling form of the Mexican tetra. Navigates entirely by lateral line. Surprisingly active and hardy — a fascinating conversation piece in any community tank.

shrimp
easy

Bloody Mary Shrimp

Neocaridina davidi 'Bloody Mary'

shrimpfreshwater

Bloody Mary Shrimp are a deeply coloured Neocaridina davidi morph with an intense, translucent blood-red coloration that differs from the opaque red of Painted Fire Red or regular Cherry Shrimp — the red pigmentation is visible through the body, giving them a vivid, glowing quality. They are as hardy and easy to breed as other Neocaridina morphs, making them accessible for beginners seeking a striking red shrimp variety.

shrimp
easy

Blue Dream Shrimp

Neocaridina davidi 'Blue Dream'

shrimpfreshwater

Blue Dream Shrimp are a high-grade selectively bred Neocaridina davidi morph displaying deep, solid cobalt-blue coloration throughout the body. The 'Dream' grade represents the most intense and uniform blue coloration, without the lighter patches seen in standard Blue Velvet morphs. They share the same hardy, beginner-friendly care requirements as Red Cherry Shrimp and breed prolifically in stable, planted tanks.

snail
easy

Blue Mystery Snail

Pomacea bridgesii var.

snailfreshwater

Deep blue-grey form of the popular mystery snail. Strikingly beautiful against light sand or green plants. Active grazer of algae, uneaten food and detritus. One of the most popular planted tank snails.

shrimp
easy

Blue Velvet Neocaridina

Neocaridina davidi var. 'Blue Velvet'

shrimpfreshwater

Blue velvet shrimp are a striking blue morph of Neocaridina davidi with a rich, opaque cornflower-blue colouration. Like all Neocaridina they are hardy and adaptable, making them an excellent choice for beginners wanting colourful shrimp.

shrimp
easy

Blue Velvet Shrimp

Neocaridina davidi var. Blue Velvet

shrimpfreshwater

Blue velvet shrimp are a selectively bred colour morph of the common neocaridina davidi, displaying an attractive solid blue coloration. They share the same hardy nature and care requirements as red cherry shrimp, making them equally beginner-friendly. They breed readily and can produce mixed-colour offspring if kept with other neocaridina colour morphs.

fish
easy

Boesemani Rainbowfish

Melanotaenia boesemani

fishfreshwater

One of the most colourful freshwater fish, the boesemani rainbowfish sports a vivid split colouration — bright blue-purple on the front half and yellow-orange on the rear. Males colour up fully in well-maintained tanks with varied diet and good water quality.

fish
easy

Bolivian Ram

Mikrogeophagus altispinosus

fishfreshwater

The Bolivian Ram is a hardier, more forgiving alternative to the German Blue Ram, tolerating a wider temperature range and less pristine water conditions without sacrificing its attractive appearance. It displays a golden-tan body, red-tipped fins, and an elongated dorsal fin with black and yellow banding. Pairs form monogamous bonds and exhibit fascinating parental care when breeding, making them rewarding to keep.

fish
easy

Bristlenose Pleco

Ancistrus sp.

fishfreshwater

The bristlenose pleco is the most commonly kept plecostomus in the hobby thanks to its manageable adult size. Males develop characteristic bushy tentacles on the snout used in mate selection. An excellent algae grazer, it should also receive supplemental feeding with blanched vegetables and sinking wafers.

plant
easy

Broadleaf Amazon Sword

Echinodorus bleheri

plantfreshwater

Echinodorus Bleheri, the Broad-Leaf Amazon Sword, is the quintessential large background plant of the freshwater aquarium. It produces broad, bright-green lanceolate leaves that can reach 50 cm, creating a dramatic focal point in larger tanks. It is a heavy root feeder and benefits greatly from nutrient-rich substrate or regular root tab fertilisation.

fish
easy

Bronze Corydoras

Corydoras aeneus

fishfreshwater

The bronze corydoras is one of the most widely kept bottom-dwellers in the hobby. Its metallic bronze-green flanks and peaceful temperament make it a staple of community tanks. Like all corydoras it requires fine sand to protect its sensitive barbels and prefers groups of six or more.

plant
easy

Bucephalandra Apple Leaf

Bucephalandra sp. 'Apple Leaf'

plantfreshwater

A round-leaved Bucephalandra variety named for its broad, almost circular apple-green leaves with a softly ruffled margin. New growth often emerges with reddish or pinkish tones before settling to a bright green, adding seasonal colour variation. One of the more recognisable Buces due to its distinctive leaf shape. Works beautifully attached to smooth stones in a Nature aquarium layout.

plant
easy

Bucephalandra Brownie Purple

Bucephalandra sp. 'Brownie Purple'

plantfreshwater

A sought-after Bucephalandra variety with small, elliptic leaves that shimmer between dark purple-green and metallic blue-green depending on lighting angle. Like all Bucephalandras it attaches to rock and driftwood and grows very slowly. Iridescent spots on the leaves catch light beautifully in high-spec setups.

plant
easy

Bucephalandra Godzilla

Bucephalandra sp. 'Godzilla'

plantfreshwater

One of the larger Bucephalandra varieties, producing broad, dark green to nearly black leaves with subtle blue-purple iridescence along the margins. The name reflects its size relative to most Buces. Its bold, wide leaves create strong contrast in a scape when positioned alongside finer-leaved plants. Attaches readily to driftwood and rock with superglue gel.

plant
easy

Bucephalandra Kedagang

Bucephalandra sp. 'Kedagang'

plantfreshwater

Bucephalandra Kedagang is one of the most popular buce varieties, featuring rounded to elliptic dark-green leaves with a distinctive blue-green iridescent shimmer visible under good lighting. Like all bucephalandra it is endemic to Borneo, growing on rocky stream beds, and must be attached to hardscape rather than buried in substrate. Growth is slow but it is surprisingly tolerant once established.

plant
easy

Bucephalandra Mini Catherine

Bucephalandra sp. 'Mini Catherine'

plantfreshwater

Bucephalandra Mini Catherine is a miniature buce cultivar with tiny, elongated leaves typically under 2 cm, making it ideal for nano aquascapes and detailed foreground hardscape work. Its leaves display a subtle dark-green to blue-green iridescence. Extremely slow growing, a single plant can take many months to form a small cluster, which only adds to its collector appeal.

plant
easy

Bucephalandra Motleyana

Bucephalandra motleyana

plantfreshwater

One of the first formally described Bucephalandra species, with elongated, slightly undulating dark green to brownish-green leaves that display a purple-blue iridescence in good light. A classic in the Buce world and widely considered a reference variety. Slightly larger than many hobbyist Buces and forms attractive clumps over time. Excellent for attaching to larger driftwood branches.

plant
easy

Bucephalandra Pygmaea

Bucephalandra pygmaea

plantfreshwater

The smallest Bucephalandra species, producing tiny lance-shaped leaves 1–3 cm long with an intense metallic blue iridescence. It creeps slowly along rock surfaces and is ideal for detailed foreground work in nano tanks. The compact growth and iridescent leaves make it one of the most visually interesting foreground plants available. Does well in low-tech setups once acclimated.

plant
easy

Bucephalandra Theia Green

Bucephalandra sp. 'Theia Green'

plantfreshwater

One of the most popular Bucephalandra varieties, known for its oval to elliptical dark green leaves with a striking blue-green iridescent shimmer when light catches the leaf surface. Slower growing than many stem plants but extremely durable once established. Like all Buces, it must be attached to hardscape — burying the rhizome will cause rot. A must-have for collectors of rare epiphytes.

plant
easy

Bucephalandra Wavy Green

Bucephalandra sp. 'Wavy Green'

plantfreshwater

Wavy Green is one of the more distinctive Bucephalandra varieties, with small to medium leaves that have notably undulated, wavy margins. The bright green foliage with subtle white iridescent spotting makes it a prized accent plant attached to hardscape. Extremely hardy and forgiving once established.

fish
easy

Buenos Aires Tetra

Hyphessobrycon anisitsi

fishfreshwater

Tough, active tetra with red-tipped fins. Tolerates cooler water down to 18°C. Known to nip fins and eat plants. Best in a species tank or with similarly robust fish.

snail
easy

Bumblebee Snail

Engina mendicaria

snailsaltwater

Tiny, striking black and yellow banded snail. Buries in sand and hunts detritus and small worms — a useful sandbed cleaner. Larger specimens have been known to eat small sleeping fish, so use with caution.

plant
easy

Cabomba

Cabomba caroliniana

plantfreshwater

Cabomba is a feathery, fan-like stem plant that creates a delicate texture in the background. It grows quickly under moderate to high light and provides excellent cover for small fish and fry. Best suited to tanks without very strong flow.

shrimp
easy

Camel Shrimp

Rhynchocinetes durbanensis

shrimpsaltwater

Red and white striped with a distinctly humped back and movable rostrum. Often sold as a decorative marine shrimp; groups create beautiful colour in aquariums. Nocturnal — more active after lights out.

coral
easy

Candy Cane Coral

Caulastrea furcata

coralsaltwater

Candy Cane Coral (also called Trumpet Coral) is a hardy LPS coral with distinctly separate, trumpet-shaped corallites in green, teal, or cream coloration — often with contrasting stripe or dot patterns reminiscent of candy canes. It is one of the most forgiving LPS corals for new reef keepers, tolerating a wider range of light and flow conditions than most Euphyllia species. New heads bud readily with regular target feeding.

fish
easy

Cape Lopez Lyretail

Aphyosemion australe

fishfreshwater

Elegant killifish with a lyretail caudal fin in shades of orange, red, and yellow. One of the gentlest killifish — works well in community tanks with small peaceful fish.

shrimp
easy

Carbon Rili Shrimp

Neocaridina davidi var.

shrimpfreshwater

Dark grey-to-black rili pattern with a transparent midsection. The monochrome equivalent of the popular red and orange rili variants. Intriguing patterning and fully Neocaridina-hardy.

fish
easy

Cardinal Tetra

Paracheirodon axelrodi

fishfreshwater

Often confused with the neon tetra, the cardinal tetra has a longer red stripe extending the full length of the body. It prefers soft, acidic blackwater conditions and looks stunning in large schools against dark substrate and dense planting.

algae
easy

Caulerpa

Caulerpa prolifera

algaesaltwater

Fast-growing macroalgae with flat, oval blades on creeping runners. Excellent nutrient export and refugium algae. Can go 'sexual' under stress — turning milky white and releasing gametes, causing a tank crash. Keep under 24h light or harvest regularly to prevent this. Widely available and very effective.

fish
easy

Celestial Pearl Danio

Danio margaritatus

fishfreshwater

Discovered in Myanmar in 2006, the celestial pearl danio features a dark body scattered with gold spots and vivid red-orange fins. It prefers densely planted tanks with subdued lighting and thrives in groups where males display to one another.

snail
easy

Cerith Snail

Cerithium sp.

snailsaltwater

Small, elongated shell snail that works the sand bed, glass, and rocks. Excellent algae grazer and detritivore. Reproduces readily and stays small.

algae
easy

Chaetomorpha

Chaetomorpha linum

algaesaltwater

The most popular refugium algae in the reef hobby — tumbling masses of stiff, wire-like bright green strands. Grows rapidly, exporting nitrates and phosphates as it's harvested. Provides a habitat for copepods and amphipods that migrate into the display tank as live food. Extremely hardy.

fish
easy

Cherry Barb

Puntius titteya

fishfreshwater

Male cherry barbs turn a vivid deep red when breeding-conditioned, making them one of the most colourful small barbs available. Unlike many barbs they are peaceful and non-nippy, suiting them to community planted tanks with other peaceful species.

shrimp
easy

Chocolate Shrimp

Neocaridina davidi var. 'Chocolate'

shrimpfreshwater

Chocolate shrimp are a deep brown-maroon Neocaridina morph with a rich, earthy colouration that contrasts beautifully with green plants and light substrate. Hardy and prolific, they are managed identically to other Neocaridina colour morphs.