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Shoal & Stem

Flora & Fauna

673 entries β€” care guides, placement tips, and notes from the community

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Adonis Pleco

Acanthicus adonis

fishfreshwater

Massive, spectacular pleco with white spots on a jet-black body. One of the largest plecos available, reaching 30+ inches. A monster fish for public-aquarium-scale tanks only.

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Altum Angelfish

Pterophyllum altum

fishfreshwater

The largest and most majestic of the Pterophyllum species. Wild altums can reach 50 cm fin-to-fin and require very tall tanks (24 in+ depth). More demanding than P. scalare β€” needs soft, acidic blackwater conditions and is sensitive to water quality. Best kept in species-only or large blackwater scapes. Wild-caught specimens are more challenging than tank-bred.

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Black Ghost Knifefish

Apteronotus albifrons

fishfreshwater

Jet-black fish with two white bands on its tail. Generates a weak electric field to navigate and communicate. Nocturnal, shy, and sensitive to water quality. Grows large.

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Checkerboard Cichlid

Dicrossus filamentosus

fishfreshwater

Exquisite micro-cichlid with a chequered body pattern and lyre-shaped tail on males. Requires very soft, acidic blackwater conditions. Peaceful but demanding β€” rewarding for experienced aquascapers.

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Demasoni Cichlid

Pseudotropheus demasoni

fishfreshwater

Stunning deep blue mbuna with pale blue stripes. Extremely aggressive despite its small size β€” requires a large colony (12+) to disperse aggression. Not for beginners.

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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.

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German Blue Ram

Mikrogeophagus ramirezi

fishfreshwater

The German blue ram is a strikingly coloured dwarf cichlid demanding pristine water quality and warm, soft, acidic conditions. It forms monogamous pairs and will defend a small territory during breeding. Sensitive to poor water quality and temperature fluctuations, making regular water changes critical.

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Gold Nugget Pleco

Baryancistrus xanthellus

fishfreshwater

Gold nugget plecos are stunning loricariids with a dark body covered in bright yellow spots and yellow-tipped fins. They are territorial and require warm, oxygen-rich, fast-flowing water with driftwood. They are algae scrapers that also need protein in their diet.

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Leopold's Angelfish

Pterophyllum leopoldi

fishfreshwater

The smallest and rarest Pterophyllum species. Distinguishable from P. scalare by its more elongated body, a distinctive black spot on the dorsal base, and an absence of the pre-dorsal notch. Rarely available in the trade and best kept by experienced keepers. Requires soft, acidic conditions similar to the altum.

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Mudskipper

Periophthalmus barbarus

fishbrackish

Extraordinary amphibious goby that spends most of its time out of water, breathing through moist skin and skipping across mud. Requires a paludarium (half water, half land) setup.

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Peacock Bass

Cichla ocellaris

fishfreshwater

Powerful, predatory cichlid with stunning gold and green patterning. Grows large and requires a big tank. Will eat any fish small enough to fit in its mouth.

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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 β€” best for experienced reef keepers.

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Tropheus

Tropheus moorii

fishfreshwater

Lake Tanganyika herbivore with dozens of stunning colour morphs by location. Requires a strict plant-based diet β€” meaty food causes deadly bloat. Best kept in large colonies of one morph.

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Twig Catfish

Farlowella acus

fishfreshwater

Remarkable camouflage artist that looks exactly like a twig or dead stick. Grazes algae and biofilm off surfaces. Sensitive to water quality β€” requires pristine, well-oxygenated water.

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Zebra Pleco

Hypancistrus zebra

fishfreshwater

The zebra pleco is one of the most sought-after pleco species, with bold black and white striping. It is a carnivorous cave-dweller from the Xingu River, which is threatened in the wild. It requires warm, well-oxygenated water and protein-rich foods.