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Living coral: Sarcophyton glaucum
Sarcophyton glaucum — an example within this genus guide; traded forms may differ. Photo: Diego Delso · Source · CC BY-SA 4.0Resized and compressed; no cropping or colour changes.

Marine · corals

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Living coral: Montipora digitata
Photo: Diego Delso · Source · CC BY-SA 4.0Resized and compressed; no cropping or colour changes.
Marine · corals

Montipora digitata

Montipora digitata

Montipora digitata is a branching stony coral with small polyps over a relatively fine surface.

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Neon tetra (Paracheirodon innesi) with a blue lateral stripe and red rear body in an aquarium
Photo: André Karwath aka Aka · Source · CC BY-SA 2.5Resized and compressed; no cropping or colour changes.
Freshwater · fish

Neon tetra

Paracheirodon innesi

The neon tetra (Paracheirodon innesi) is a small, peaceful freshwater fish from the Amazon basin in Peru, Colombia and Brazil. Its luminous blue stripe and red rear half make it…

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Orange Mexican dwarf crayfish — Cambarellus patzcuarensis — Orange cultivated form (CPO) of Cambarellus patzcuarensis.
Orange cultivated form (CPO) of Cambarellus patzcuarensis. Photo: Albertomeg · Source · CC0Resized and compressed; no cropping or colour changes.
Freshwater crayfish

Orange Mexican dwarf crayfish

Cambarellus patzcuarensis

The orange Mexican dwarf crayfish is small but still has claws, territorial behaviour and vulnerable moults.

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Pajama cardinalfish — Sphaeramia nematoptera
Photo: Brian Gratwicke · Source · CC BY 2.0Resized and compressed; no cropping or colour changes.
Marine fish

Pajama cardinalfish

Sphaeramia nematoptera

The pajama cardinalfish has a pattern seemingly assembled from several fish: a yellow-green head, red eye, dark middle bar and spotted rear half.

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Panda cory — Hoplisoma panda
Photo: Chronotopian · Source · CC BY-SA 3.0Resized and compressed; no cropping or colour changes.
Freshwater · fish

Panda cory

Hoplisoma panda

The panda cory, Hoplisoma panda, combines a striking black eye mask with an inquisitive way of searching for food.

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Picasso triggerfish — Rhinecanthus aculeatus
Photo: dr.scott.mills · Source · CC BY-SA 2.0Resized and compressed; no cropping or colour changes.
Marine fish

Picasso triggerfish

Rhinecanthus aculeatus

The Picasso triggerfish is a powerful, inquisitive marine fish with a striking pattern around its head and eyes.

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Living coral: Xenia umbellata
Xenia umbellata — an example within this genus guide; traded forms may differ. Photo: Diego Delso · Source · CC BY-SA 4.0Resized and compressed; no cropping or colour changes.
Marine · corals

Pulsing Xenia

Xenia

Xenia is a genus of soft corals, many traded forms of which have rhythmically opening and closing polyps.

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Pygmy cory — Gastrodermus pygmaeus
Photo: Carnat Joel · Source · CC BY 2.0Resized and compressed; no cropping or colour changes.
Freshwater · fish

Pygmy cory

Gastrodermus pygmaeus

Also known as Corydoras pygmaeus. This small shoaling fish is not a leftover-food cleaner. Provide fine food, a gentle substrate and quiet surroundings.

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Ram cichlid — Mikrogeophagus ramirezi
Photo: Sven Kullander · Source · CC BY-SA 4.0Resized and compressed; no cropping or colour changes.
Freshwater · fish

Ram cichlid

Mikrogeophagus ramirezi

A warm-water dwarf cichlid sensitive to unstable or polluted water. Provide a mature aquarium with quiet, compatible companions and space for the pair.

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Red root floater — Phyllanthus fluitans
Photo: Agnieszka Kwiecień, Nova · Source · CC BY-SA 4.0Resized and compressed; no cropping or colour changes.
Freshwater · plants

Red root floater

Phyllanthus fluitans

The red root floater (Phyllanthus fluitans) lives at the water surface and forms small groups with round to heart-shaped leaves and hanging roots.

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Regal tang — Paracanthurus hepatus
Photo: Tewy · Source · CC BY 2.5Resized and compressed; no cropping or colour changes.
Marine fish

Regal tang

Paracanthurus hepatus

The regal tang is instantly recognisable by its bright blue colour and black palette-like marking.

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Living coral: Ricordea florida
Photo: Robert Howie · Source · CC BY-SA 2.0Resized and compressed; no cropping or colour changes.
Marine · corals

Ricordea florida

Ricordea florida

Ricordea florida is a colourful corallimorph with conspicuous rounded tentacles on its oral disc.

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Roundleaf rotala — Rotala rotundifolia
Emersed form; leaves and flowers can differ from submerged growth. Photo: Vinayaraj · Source · CC BY-SA 3.0Resized and compressed; no cropping or colour changes.
Freshwater · plants

Roundleaf rotala

Rotala rotundifolia

Round-leaved rotala (Rotala rotundifolia) is a delicate stem plant for a soft-looking background.

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Royal gramma — Gramma loreto
Photo: Brian Gratwicke · Source · CC BY 2.0Resized and compressed; no cropping or colour changes.
Marine fish

Royal gramma

Gramma loreto

The royal gramma combines a purple front half with a yellow rear half and makes a sheltered rock crevice its home.

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Rummy-nose tetra — Petitella bleheri
Photo: -serwacy01- · Source · CC BY-SA 4.0Resized and compressed; no cropping or colour changes.
Freshwater · fish

Rummy-nose tetra

Petitella bleheri

The rummy-nose tetra, Petitella bleheri, is instantly recognisable by its red head, silver body and black-and-white tail.

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Siamese fighting fish — Betta splendens
Photo: ivabalk · Source · CC0Resized and compressed; no cropping or colour changes.
Freshwater · fish

Siamese fighting fish

Betta splendens

A territorial labyrinth fish needing calm surroundings and surface access. Do not house males together. Not an automatic choice for a community aquarium.

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Southern platyfish — Xiphophorus maculatus
Photo: Usien · Source · CC BY-SA 4.0Resized and compressed; no cropping or colour changes.
Freshwater · fish

Southern platyfish

Xiphophorus maculatus

The southern platyfish, Xiphophorus maculatus, is a sturdy small livebearer bred in many colours.

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Sterba's cory — Hoplisoma sterbai
Photo: Tino Strauss · Source · CC BY-SA 3.0Resized and compressed; no cropping or colour changes.
Freshwater · fish

Sterba's cory

Hoplisoma sterbai

Sterba's cory, Hoplisoma sterbai, stands out through pale spots on a dark head and orange accents on the pectoral fins.

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Tailspot blenny — Ecsenius stigmatura
Photo: Rickard Zerpe · Source · CC BY 2.0Resized and compressed; no cropping or colour changes.
Marine fish

Tailspot blenny

Ecsenius stigmatura

The tailspot blenny is a small rock-dweller often peering from an opening before making short grazing trips.

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Tiger barb — Puntigrus tetrazona
Photo: Photo by Derek Ramsey (Ram-Man) · Source · CC BY-SA 2.5Resized and compressed; no cropping or colour changes.
Freshwater · fish

Tiger barb

Puntigrus tetrazona

The tiger barb, Puntigrus tetrazona, is a lively fish with dark vertical bars and a determined approach to aquarium life.

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