🌱 We're in beta — your feedback helps us grow. Share your thoughts
Shoal & Stem

Flora & Fauna

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

plant
intermediate

Water Hedge

Didiplis diandra

plantfreshwater

A slender, delicate stem plant with fine, needle-like opposite leaves. Under high light and CO2 it develops vivid orange-red colouring that makes it a stunning accent in Dutch and Nature Aquarium layouts. It is sensitive to low light and nutrient deficiencies, which quickly cause yellowing.

plant
easy

Water Lettuce

Pistia stratiotes

plantfreshwater

Water lettuce is a floating rosette plant with velvety, pale green leaves and a substantial root system. It provides excellent shade, nutrient export, and shelter for surface-shy fish. It grows rapidly in bright conditions and may become invasive outdoors.

algae
hard

Water Net Algae

Hydrodictyon reticulatum

algaefreshwater

Remarkable bright green net-like colonies — a tessellated honeycomb of cells visible to the naked eye. Beautiful under a microscope but a serious nuisance in garden ponds. Thrives in warm, nutrient-rich water. Manual removal is the primary method as few animals eat it effectively.

plant
easy

Water Sprite

Ceratopteris thalictroides

plantfreshwater

Water Sprite is a versatile aquatic fern that can be grown both floating and rooted. The finely dissected, lacy fronds give it a delicate, feathery appearance. Floating specimens develop broader, more deeply lobed leaves and provide excellent surface cover and fry refuge. A classic, beginner-friendly plant that grows vigorously.

plant
hard

Water Violet

Hottonia palustris

plantfreshwater

Stunning cold-water stem plant with whorls of feathery leaves. One of the most beautiful temperate aquarium plants. Challenging to keep in tropical tanks — prefers cool, clear, well-oxygenated water.

plant
easy

Water Wisteria

Hygrophila difformis

plantfreshwater

Famous for its deeply pinnate, fern-like leaves that look remarkably intricate yet require almost no effort. A true beginner's showpiece — grows rapidly, outcompetes algae, and can be planted or left floating. Leaf shape changes dramatically depending on light intensity.

plant
easy

Water Wisteria

Hygrophila difformis

plantfreshwater

Water wisteria is a fast-growing stem plant with deeply lobed, feathery leaves that vary in form depending on light intensity. It is an excellent nutrient sponge that helps control algae in new setups. Cuttings root readily and it adapts to a wide range of water parameters.

plant
expert

Waterwort

Elatine triandra

plantfreshwater

One of the finest-leaved carpet plants in existence — creates an almost moss-like lawn of tiny round leaves. Extremely challenging; requires CO2, very high light, and excellent nutrient control. The pinnacle of carpeting plants.

plant
easy

Wavy Aponogeton

Aponogeton crispus

plantfreshwater

A bulb plant with long, bright green leaves that have distinctly wavy, crinkled margins. One of the easiest Aponogeton species to keep, tolerating low light without CO2 injection. It goes through natural growth and dormancy cycles — if leaves die back, leave the bulb and it will re-sprout. An excellent low-maintenance background plant.

fish
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.

plant
easy

Weeping Moss

Vesicularia ferriei

plantfreshwater

Weeping Moss is prized for the elegant downward-drooping habit of its fine fronds, which cascade gracefully off driftwood and rocks like a willow tree in miniature. This weeping growth pattern is most pronounced in moderate flow and makes it one of the most aesthetically distinct mosses for aquascaping. It is slightly slower growing than Java Moss but creates a more refined, delicate textural effect.

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.

fish
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.

fish
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.

plant
hard

Whorly Rotala

Rotala wallichii

plantfreshwater

Delicate, feathery pink-to-red stem plant. One of the most visually striking rotala species. Demanding — needs high light, CO2 injection, and pristine water to colour up.

plant
easy

Willis's Cryptocoryne

Cryptocoryne x willisii

plantfreshwater

One of the smallest and most versatile cryptocorynes — stays compact even in high light. Deep green, slightly wavy leaves. Perfect low-maintenance foreground or midground plant that spreads via runners.

plant
easy

Willow Hygrophila

Hygrophila salicifolia

plantfreshwater

Long, willow-shaped leaves up to 15 cm in length give this species a softer, more natural look compared to other Hygrophilas. The leaves are pale green and narrow, creating a flowing appearance in flow or current. One of the taller background choices in the genus.

plant
intermediate

Willow Moss

Fontinalis antipyretica

plantfreshwater

Willow Moss is a native cold-water aquatic moss with delicate, overlapping dark green leaves on branching stems. It prefers cooler water and good flow, making it excellent for coldwater and temperate setups with goldfish, temperate plants, or in nature biotopes. It attaches to rocks and wood and creates a natural, stream-like texture.

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.

shrimp
hard

Wine Red Shrimp

Caridina cf. cantonensis

shrimpfreshwater

Deep maroon-red Caridina with little to no white markings. A striking colour mutation of the Crystal Red lineage. Requires the same demanding soft, acidic water parameters as other high-grade Caridina.

fish
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.

shrimp
easy

Yellow Neocaridina

Neocaridina davidi var. Yellow

shrimpfreshwater

Yellow Neocaridina (also known as Yellow Sakura or Banana Shrimp) are a selectively bred morph of Neocaridina davidi displaying a clean, uniform lemon-yellow to deep golden colouration. They are equally hardy and prolific as red cherry shrimp, making them ideal for beginners seeking a splash of warm colour in planted tanks. Against dark aquasoil substrates and green plants the yellow stands out vividly.

fish

Yellow Tiger Endler

Poecilia wingei

fishfreshwater
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
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.

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 — consuming green spot algae, diatoms, and film algae from glass, plants, and rockwork — and cannot reproduce in freshwater, keeping populations controlled. Hard water is essential for maintaining healthy shell integrity.

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.

fish

Zygatus Corydoras

Corydoras zygatus

fishfreshwater