Shoal & Stem

Species Catalogue

1,376 species — care guides, community photos, water parameters, and tank-mate compatibility.

fish
intermediate

Double Tail Betta

Betta splendens 'Double Tail'

fishfreshwater
2.5″·5+ gal·semi-aggr.
fish
beginner

Dragon Guppy

Poecilia reticulata

fishfreshwater
2.5″·10+ gal·group 3+·peaceful
algae
intermediate

Dragon's Tongue

Halymenia sp.

algaesaltwater

Brilliant scarlet-red, blade-shaped macroalgae — one of the most visually striking species for display refugia. Provides excellent colour contrast and nutrient export. More delicate than Chaeto; requires moderate flow and consistent light. Popular with collectors and stunning under reef lighting.

shrimp
Eeasy

Dream Blue Shrimp

Neocaridina davidi

shrimpfreshwater
1.5″·5+ gal·group 10+·peaceful
plant
beginner

Duckweed

Lemna minor

plantfreshwater

Duckweed is the smallest flowering plant and one of the fastest-growing aquatic plants available. It provides effective nutrient export and surface shade while serving as live food for herbivorous fish. It can quickly cover the entire surface if not managed.

fish
beginner

Dumbo Ear Guppy

Poecilia reticulata

fishfreshwater
2″·10+ gal·group 3+·peaceful
coral
beginner

Duncan Coral

Duncanopsammia axifuga

coralsaltwater
2″·30+ gal·peaceful
fish
intermediate

Dwarf Anchor Catfish

Hara jerdoni

fishfreshwater
1.5″·10+ gal·group 3+·peaceful
plant
advanced

Dwarf Baby Tears

Hemianthus callitrichoides

plantfreshwater

The smallest aquarium plant in the world, native to Cuba. Forms a dense bright green carpet highly prized in Nature Aquariums and iwagumi layouts. Requires high light, CO₂ injection, and a nutrient-rich substrate to thrive.

invertebrate
beginner

Dwarf Blue Crayfish

Cambarellus diminutus

invertebratefreshwater
1.2″·10+ gal·peaceful
shrimp
Eeasy

Dwarf Blue Diamond Shrimp

Neocaridina davidi

shrimpfreshwater
1.5″·5+ gal·group 10+·peaceful
fish
intermediate

Dwarf Chain Loach

Ambastaia sidthimunki

fishfreshwater
2″·15+ gal·group 5+·peaceful
plant
Eeasy

Dwarf Chain Sword

Helanthium tenellum

plantfreshwater

Dwarf Chain Sword is a popular foreground stem plant with delicate, narrow green leaves that form dense carpets in aquariums. It grows relatively quickly and produces runners that spread horizontally, making it ideal for creating lush carpet effects. This plant is undemanding and tolerates a wide range of water conditions, making it excellent for beginners.

fish
intermediate

Dwarf Emerald Rasbora

Celestichthys erythromicron

fishfreshwater
1″·10+ gal·group 8+·peaceful
fish
beginner

Dwarf Gourami

Trichogaster lalius

fishfreshwater
3.5″·15+ gal·semi-aggr.
plant
intermediate

Dwarf Hairgrass

Eleocharis parvula

plantfreshwater

Dwarf hairgrass forms a lush, grass-like carpet in the foreground of aquascapes. It requires moderate to high light and injected CO2 to spread effectively, otherwise growth is sparse and slow. Regular trimming encourages lateral runners and a denser mat.

plant
intermediate

Dwarf Hairgrass Mini

Eleocharis pusilla

plantfreshwater

Eleocharis pusilla (Dwarf Hairgrass Mini) is a nano-scale hairgrass species producing extremely fine, short blades reaching only 3–5 cm, making it noticeably shorter and denser than standard Dwarf Hairgrass (E. parvula). Under CO2 injection and good light it spreads rapidly via runners to form a tight, lawn-like foreground carpet highly prized in Nature Aquarium-style layouts. It is particularly effective in nano aquariums where even E. parvula would be too tall.

invertebrate
beginner

Dwarf Mexican Brown Crayfish

Cambarellus montezumae

invertebratefreshwater
1.6″·10+ gal·peaceful
invertebrate
Eeasy

Dwarf Mexican Crayfish

Cambarellus patzcuarensis

invertebratefreshwater
1.5″·10+ gal·peaceful
fish
beginner

Dwarf Neon Rainbowfish

Melanotaenia praecox

fishfreshwater
2.5″·15+ gal·group 6+·peaceful
invertebrate
beginner

Dwarf Orange Crayfish

Cambarellus sp. orange

invertebratefreshwater
1.6″·10+ gal·peaceful
fish
beginner

Dwarf Pencilfish

Nannostomus marginatus

fishfreshwater
1.2″·10+ gal·group 6+·peaceful
fish
intermediate

Dwarf Puffer

Carinotetraodon travancoricus

fishfreshwater
1″·10+ gal·semi-aggr.
plant
beginner

Dwarf Red Lily

Nymphaea rubra

plantfreshwater

Deep red lily with arrow-shaped submerged leaves. Will send lily pads to the surface if not trimmed. Beautiful red accent plant from a bulb.

plant
beginner

Dwarf Water Lettuce

Pistia stratiotes 'Dwarf'

plantfreshwater

Miniature form of Water Lettuce with rosettes under 2 inches. Long trailing roots. Better for smaller tanks than the full-sized version.

fish
beginner

Eastern Rainbowfish

Melanotaenia splendida

fishfreshwater
4.5″·30+ gal·group 6+·peaceful
plant
beginner

Echinodorus Aflame

Echinodorus sp. 'Aflame'

plantfreshwater

Compact sword with deep crimson new growth. Stays smaller than most swords — suitable for tanks as small as 10 gallons. Easy and rewarding.

plant
beginner

Echinodorus Bleheri

Echinodorus bleheri

plantfreshwater

Echinodorus Bleheri, the Broad-Leaf Amazon Sword, is the quintessential large background plant of the freshwater aquarium. It produces broad, bright-green lanceolate leaves that can reach 50 cm, creating a dramatic focal point in larger tanks. It is a heavy root feeder and benefits greatly from nutrient-rich substrate or regular root tab fertilisation.

plant
Mmedium

Echinodorus Kleiner Bar

Echinodorus Kleiner Bar

plantfreshwater

Echinodorus Kleiner Bar is a compact sword plant with distinctive narrow, lance-shaped leaves that display prominent red or reddish-brown barring patterns. This mid-sized stem plant grows moderately and is ideal for midground placement, offering attractive foliage without overwhelming smaller aquascapes. It is relatively undemanding and suitable for intermediate aquarists seeking a colorful accent plant.

plant
Mmedium

Echinodorus Oriental

Echinodorus Oriental

plantfreshwater

Echinodorus Oriental is a medium-sized sword plant featuring distinctive reddish-brown to olive-green leaves with prominent veining and a slightly wavy margin. It grows as a rosette from a rhizomatous base and is moderately fast-growing, making it suitable for midground to background placement in larger aquariums.

plant
beginner

Echinodorus Ozelot

Echinodorus 'Ozelot'

plantfreshwater

Echinodorus Ozelot is a hybrid cultivar renowned for its striking green leaves adorned with irregular dark-brown to red spots, resembling the coat of an ocelot. It is a vigorous, moderately sized sword plant reaching 25–40 cm that makes an eye-catching focal specimen in the midground or background. New leaves often emerge with a reddish tint before maturing to spotted green.

plant
beginner

Echinodorus Radicans

Echinodorus cordifolius

plantfreshwater

Very large sword plant with broad heart-shaped leaves. Grows emersed readily. Needs large tanks (55+ gallons). Virtually indestructible.

plant
Mmedium

Echinodorus Red Rubin

Echinodorus Red Rubin

plantfreshwater

Echinodorus Red Rubin is a stunning sword plant prized for its deep red to burgundy leaf coloration, which intensifies under high light and nutrient-rich conditions. This mid-sized stem plant features broad, lance-shaped leaves and moderate growth rate, making it an excellent choice for midground to background placement in planted aquariums.

plant
beginner

Echinodorus Reni

Echinodorus sp. 'Reni'

plantfreshwater

Compact red-brown sword plant. Stays small enough for midground use. One of the smallest red Echinodorus varieties available.

plant
beginner

Echinodorus Uruguayensis

Echinodorus uruguayensis

plantfreshwater

Echinodorus Uruguayensis is a large, bold sword plant from South America producing broad, dark-green leaves with a smooth texture and prominent venation, reaching up to 60 cm in height. It is notable for tolerating cooler water than most tropical swords, thriving at temperatures as low as 16 °C. Its imposing size makes it best suited as a specimen background plant in larger aquariums.

plant
Mmedium

Echinodorus Vesuvius

Echinodorus Vesuvius

plantfreshwater

Echinodorus Vesuvius is a striking sword plant with deeply lobed, reddish-brown leaves that resemble a volcanic eruption, hence its name. This mid-sized stem plant grows upright and develops intricate leaf patterns with prominent veining. It is moderately demanding but rewarding for aquarists seeking dramatic foliage color and texture.