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Shoal & Stem

Flora & Fauna

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

fish
easy

Turquoise Rainbowfish

Melanotaenia lacustris

fishfreshwater

The turquoise rainbowfish has an intense blue-green iridescence across its body that intensifies at peak colour. It is a larger, robust rainbowfish that does best in spacious tanks with good filtration. Males colour up brilliantly in well-maintained setups.

fish
hard

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 — requires pristine, well-oxygenated water.

fish
medium

Umbrella Dwarf Cichlid

Apistogramma borellii

fishfreshwater

Cool-water dwarf cichlid with a yellow body and blue iridescence. Cooler temperature preference than most apistos. Peaceful and excellent for planted tanks.

fish
easy

Upside-Down Catfish

Synodontis nigriventris

fishfreshwater

Fascinating catfish that swims inverted to feed on the underside of leaves and wood. The inverted posture causes its belly to be darker than its back — the reverse of most fish.

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medium

Veil Angelfish

Pterophyllum scalare

fishfreshwater

A captive-bred variety with dramatically elongated, veil-like fins on the dorsal, anal, and caudal fins. The flowing fins are visually stunning but more delicate — avoid housing with fin-nipping species. The veil gene can be combined with any colour morph (silver, koi, marble, etc.).

fish
easy

Venezuelan Corydoras

Corydoras venezuelanus

fishfreshwater

Venezuelan corydoras is similar to the bronze corydoras but displays more orange-red colouration on the pectoral and dorsal fins, especially in males. It is hardy, adaptable, and makes an excellent beginner corydoras.

fish
medium

Venustus Cichlid

Nimbochromis venustus

fishfreshwater

Striking Malawi hap with a giraffe-spotted pattern. Males develop a vivid blue head. A crafty ambush predator that lies still pretending to be dead to lure prey. Best with other large Malawi haps.

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easy

Vietnamese Cardinal Minnow

Tanichthys micagemmae

fishfreshwater

Closely related to the White Cloud Mountain Minnow but with more vivid colouring — bright red stripe and neon fins. Smaller and more delicate. Excellent for cool, planted nano tanks.

fish
easy

Von Rio Tetra

Hyphessobrycon flammeus

fishfreshwater

The von Rio tetra, also called the flame tetra, is one of the first tropical fish ever imported to Europe. The rear body and fins of males glow a vivid red-orange, resembling flames. Despite being over 100 years in the hobby it remains a charming, underrated choice. It is extremely hardy and tolerates a wide range of water conditions.

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easy

Weather Loach

Misgurnus anguillicaudatus

fishfreshwater

Long, eel-like loach said to predict weather changes by becoming hyperactive before storms. Extremely hardy and cold-tolerant. Peaceful, playful, and full of personality.

fish
moderate

Weitzmani Corydoras

Corydoras weitzmani

fishfreshwater

Also known as the two saddle corydoras, C. weitzmani has two prominent dark saddle markings across the upper body plus a dark band through the eye. Males develop a striking elongated dorsal fin ray. A rewarding species for the dedicated corydoras keeper who can provide soft, cool water conditions.

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easy

Whiptail Catfish

Rineloricaria lanceolata

fishfreshwater

Slender, armoured catfish with a long whip-like tail. Excellent algae grazer that clings to wood and glass. Peaceful and relatively easy to keep. Males guard the eggs.

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easy

White Cloud Mountain Minnow

Tanichthys albonubes

fishfreshwater

Once thought to be extinct in the wild, the white cloud mountain minnow is a cold-tolerant fish that thrives at room temperature without a heater. It has a subtle but attractive iridescent stripe and pairs well with pond-style or unheated aquariums.

fish
intermediate

Wine Red Betta

Betta coccina

fishfreshwater

Betta coccina, the Wine Red Betta, is a small wild betta from blackwater peat swamps with an intense crimson-red body accented by a single iridescent blue-green spot on the flank. A paternal mouthbrooder, it is far less aggressive than B. splendens and can sometimes be maintained in pairs or small groups in very heavily planted species tanks. It demands soft, highly acidic water mimicking its blackwater habitat.

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easy

X-Ray Tetra

Pristella maxillaris

fishfreshwater

The X-ray tetra (also called the pristella tetra) has a nearly transparent body through which the spine and organs are clearly visible — hence the name. Its dorsal and anal fins are boldly banded in black, white, and yellow. It is an extraordinarily adaptable species that tolerates both soft acidic and hard alkaline water, making it one of the hardiest tetras available.

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easy

Yellow Tang

Zebrasoma flavescens

fishsaltwater

Brilliant solid yellow tang from Hawaiian reefs. A staple of the reef aquarium hobby. Excellent algae grazer and generally peaceful.

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Yellow Tiger Endler

Poecilia wingei

fishfreshwater
fish
easy

Yellow Watchman Goby

Cryptocentrus cinctus

fishsaltwater

Vibrant yellow with blue spots, best known for its mutualistic relationship with pistol shrimp — the shrimp digs and maintains a shared burrow while the goby stands guard. A staple of any reef tank.

fish
easy

Yoyo Loach

Botia almorhae

fishfreshwater

The yoyo loach gets its name from the Y-O-Y-O pattern visible on juveniles. Active, social, and entertaining, it is one of the most popular loaches in the hobby. An excellent snail hunter that becomes bolder and more colourful with age.

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medium

Zebra Angelfish

Pterophyllum scalare

fishfreshwater

A captive-bred morph with additional vertical black stripes beyond the standard three, creating a more densely barred zebra-like pattern. A popular show variety that stands out in species-specific or South American biotope scapes.

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easy

Zebra Danio

Danio rerio

fishfreshwater

Zebra danios are robust, active schooling fish characterised by horizontal blue and silver stripes. They are among the most beginner-friendly species available, tolerating a wider range of water conditions than most tropical fish. Their bold, zippy behaviour makes them excellent dither fish to reduce the shyness of more reclusive tankmates.

fish
easy

Zebra Loach

Botia striata

fishfreshwater

The zebra loach has bold, narrow vertical stripes across its body. Smaller and more peaceful than many other botia loaches, it is suitable for community tanks and remains manageable in size. Like all loaches it is social and needs companions.

fish
hard

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.

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Zygatus Corydoras

Corydoras zygatus

fishfreshwater
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