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Shoal & Stem

Flora & Fauna

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

fish
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.

fish
easy

Yellow Watchman Goby

Cryptocentrus cinctus

fishsaltwater

Vibrant yellow with blue spots, best known for its mutualistic relationship with pistol shrimp β€” 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.

fish
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.

snail
easy

Zebra Nerite Snail

Neritina natalensis 'Zebra'

snailfreshwater

The Zebra Nerite Snail is the most recognisable nerite variety, with a distinctly striped shell of alternating black and yellow bands that closely resembles a zebra's coat. Like all nerites it is an outstanding algae grazer β€” consuming green spot algae, diatoms, and film algae from glass, plants, and rockwork β€” and cannot reproduce in freshwater, keeping populations controlled. Hard water is essential for maintaining healthy shell integrity.

coral
easy

Zoanthids

Zoanthus sp.

coralsaltwater

Zoanthids (zoas) are colonial soft corals that form mats of individual polyps in an extraordinary range of colours and patterns, making them highly collectible. They are among the hardiest corals for beginner reef keepers and grow rapidly under good conditions. Some zoa morphs contain palytoxin; always wear gloves when handling.

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