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Shoal & Stem

Flora & Fauna

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

plant
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Cryptocoryne Balansae

Cryptocoryne crispatula var. balansae

plantfreshwater

Cryptocoryne Balansae is a dramatic, tall-growing crypt producing strap-like leaves with deeply ruffled, crinkled edges that can reach 40–60 cm in length. Its striking vertical texture makes it one of the most visually distinctive background plants available without requiring high tech. Once established it is robust and spreads into an impressive stand via runners.

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Cryptocoryne Beckettii

Cryptocoryne beckettii

plantfreshwater

Cryptocoryne Beckettii is a compact, adaptable crypt producing wavy-edged leaves that range from olive-green on the upper surface to pink-brown or purple on the underside — colouration intensifying under brighter light. It is among the most forgiving crypts, tolerating harder and more alkaline water than most of its relatives. A reliable midground plant for low-tech community tanks.

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Cryptocoryne Flamingo

Cryptocoryne wendtii 'Flamingo'

plantfreshwater

Cryptocoryne Flamingo is an eye-catching cultivar with pale pink to deep rose-pink leaves that maintain their colour even in moderate light. A relatively recent cultivar, it adds pastel colour contrast rarely seen in aquatic plants. Hardy and slow-growing like other Cryptocorynes, making it easy to use as a focal foreground or midground accent.

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Cryptocoryne Lucens

Cryptocoryne lucens

plantfreshwater

Cryptocoryne Lucens is a small, narrow-leaved crypt with plain bright-green foliage, reaching about 10–15 cm in height. It spreads via runners to form a tidy clump over time and is one of the easiest crypts to keep, tolerating a wide range of conditions including harder water. An excellent choice for foreground or midground planting without the demanding care of more ornate crypt species.

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Cryptocoryne Lutea

Cryptocoryne lutea

plantfreshwater

Cryptocoryne lutea is a small to medium-sized crypt producing olive-green to brownish-green leaves with a slightly hammered or textured surface. It is one of the most adaptable and forgiving crypt species, tolerating a wide range of water conditions including moderate hardness and near-neutral pH. Reaching 10–20 cm in height, it works well in the foreground or midground of medium to large planted tanks, spreading via runners into tidy clumps.

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Cryptocoryne Nevesii

Cryptocoryne nevesii

plantfreshwater

A small, compact Cryptocoryne with narrow, lance-shaped leaves of uniform mid-green. One of the more underrated compact Crypts, it stays small and spreads slowly via runners to form neat clusters. A good foreground alternative where HC Cuba or Monte Carlo would require CO2.

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Cryptocoryne Parva

Cryptocoryne parva

plantfreshwater

Cryptocoryne Parva is the smallest crypt species, producing narrow, plain-green leaves that rarely exceed 5–6 cm — making it the only crypt truly suitable for a foreground carpet role. Growth is extremely slow even under good conditions; patience of several months is required before carpeting effect appears. It is also the least prone to 'crypt melt' among its genus.

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Cryptocoryne Petchii

Cryptocoryne petchii

plantfreshwater

A compact, manageable Cryptocoryne from Sri Lanka with narrow, lance-shaped leaves that can range from olive-green to brownish depending on conditions. Often confused with C. wendtii but distinguished by its shorter stature and slightly narrower leaves. It is very adaptable and tolerates a wide pH and hardness range, making it one of the best Crypts for beginners. Forms attractive rosettes in the foreground or midground of most tanks.

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Cryptocoryne Pontederiifolia

Cryptocoryne pontederiifolia

plantfreshwater

A medium-sized Cryptocoryne with broad, oval-to-heart-shaped leaves in a uniform bright green. The rounded leaf form is quite different from most Crypts and adds a distinctive look to the midground. Relatively fast-growing for a Crypt and more tolerant of harder water than many species. An underrated choice that pairs beautifully with more colourful plants like AR or Rotala.

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Cryptocoryne Undulata

Cryptocoryne undulata

plantfreshwater

A versatile mid-sized Cryptocoryne with lanceolate leaves that have attractively undulated margins. Colouration ranges from olive-green to reddish-brown depending on light intensity and water conditions. It is one of the hardiest Cryptocoryne species, tolerating a wider range of pH and hardness than most.

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Cryptocoryne Wendtii

Cryptocoryne wendtii

plantfreshwater

Cryptocoryne wendtii is a popular, low-maintenance rosette plant available in several colour forms from green to brown-red. It may undergo 'crypt melt' when first planted or after water chemistry changes, but almost always recovers. Once established it is resilient and spreads via runners.

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Cryptocoryne Wendtii Green

Cryptocoryne wendtii 'Green'

plantfreshwater

The green form of Cryptocoryne wendtii has smooth, bright green leaves with a subtle hammered texture. It is one of the most adaptable crypts available, tolerating a wide range of light, water, and substrate conditions. An excellent beginner midground plant.

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Dense Waterweed

Egeria densa

plantfreshwater

Classic, bulletproof stem plant with whorls of bright green leaves. One of the best beginner plants — grows rapidly without CO2 and tolerates cool water. Also excellent for goldfish and temperate tanks.

fish
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Diamond Tetra

Moenkhausia pittieri

fishfreshwater

The Diamond Tetra lives up to its name — under aquarium lighting the large, iridescent scales along its flanks flash with silver, gold, and green like faceted diamonds. Males develop impressive, elongated dorsal and anal fins as they mature. This Venezuelan species is undemanding and peaceful, making it an eye-catching alternative to more common tetras for medium-sized planted community tanks.

algae
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Diatoms (Brown Algae)

Bacillariophyta

algaefreshwater

Brown, dusty coating on glass, substrate, and decorations — the most common algae in newly set-up tanks. Feeds on silicates from tap water and substrate. Almost always disappears on its own within 6–8 weeks once silicates are depleted. Otocinclus catfish and nerites clean it rapidly.

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Dojo Loach

Misgurnus anguillicaudatus

fishfreshwater

The dojo loach (weather loach) is a large, eel-like fish famous for becoming more active before changes in barometric pressure. It is extremely peaceful, cold-tolerant, and a hardy beginner fish. It burrows into substrate and requires a tight-fitting lid.

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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.

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Dwarf Gourami

Trichogaster lalius

fishfreshwater

The Dwarf Gourami is a compact labyrinth fish renowned for the male's spectacular flame-red and turquoise-blue diagonal stripes on a petite 5–6 cm body. It is a popular choice for smaller community tanks where larger gourami species would be impractical. Males can be mildly aggressive toward one another, so a single male per tank is usually advisable unless the aquarium is large and well planted.

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Dwarf Neon Rainbowfish

Melanotaenia praecox

fishfreshwater

The dwarf neon rainbowfish is one of the most popular rainbowfish in the hobby, combining a brilliant electric blue body with vivid red fins in males. At just 5–6 cm it is considerably smaller than most melanotaenia and suits medium-sized planted tanks. A large school in a well-planted aquarium under good lighting is a spectacular sight.

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Dwarf Pencilfish

Nannostomus marginatus

fishfreshwater

Tiny, boldly striped pencilfish with red-tipped fins. One of the most popular foreground fish in aquascaping — its small size makes it perfect for nano tanks and densely planted layouts.

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Dwarf Sagittaria

Sagittaria subulata

plantfreshwater

Sagittaria subulata is a fast-growing grass-like plant that spreads via runners to form dense meadows. It works as both a carpet in nano tanks and a mid-background plant in larger setups depending on lighting intensity. Very undemanding and adaptable.

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Eastern Rainbowfish

Melanotaenia splendida

fishfreshwater

Robust Australian rainbowfish with vivid red-orange flanks and iridescent scales. Very hardy and adaptable. A great community fish that colours up beautifully under good conditions.

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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.

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Electric Blue Acara

Andinoacara pulcher var.

fishfreshwater

Brilliant metallic blue cichlid that stays a manageable size. Peaceful for a cichlid and easily bred. One of the most striking freshwater fish available.

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Electric Yellow Lab

Labidochromis caeruleus

fishfreshwater

One of the most popular Malawi cichlids — vivid yellow with black fin trim. Relatively peaceful for a mbuna. Mouthbrooder. A great beginner African cichlid.

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Elegant Corydoras

Corydoras elegans

fishfreshwater

The elegant corydoras has a beautiful mosaic pattern of dark markings on a cream body, with males displaying vivid green iridescence on the upper body. A moderately active species that spends most of its time exploring the substrate. Peaceful and hardy, it is an excellent choice for planted community tanks.

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Elephant Ear Betta

Betta splendens 'Dumbo'

fishfreshwater

The Elephant Ear or Dumbo Betta has extraordinarily large, ruffled pectoral fins resembling elephant ears. This genetic variant can occur in any tail-type betta and is bred specifically for the oversized pectoral fins rather than the caudal shape. The large pectorals are used for slow, graceful swimming and give the fish an unmistakable, dramatic appearance.

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Ember Tetra

Hyphessobrycon amandae

fishfreshwater

Ember tetras are tiny, fiery orange fish ideal for nano planted tanks. They occupy the midwater and are completely peaceful, making them safe with shrimp and other small species. Their brilliant colour intensifies under warm lighting and dark substrate.

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Emerald Corydoras

Brochis splendens

fishfreshwater

The emerald corydoras (now classified as Brochis splendens) is larger than most corydoras and sports a stunning metallic green body. It is a peaceful schooling fish that prefers groups and thrives in heavily planted tanks with soft substrate.

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Emerald Eye Rasbora

Brevibora dorsiocellata

fishfreshwater

The emerald eye rasbora has a vivid electric-green eye and a subtle iridescent body. It is a small, peaceful schooling fish that adds movement to the upper-midwater of planted tanks. Undemanding and compatible with most community species.

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Empire Gudgeon

Hypseleotris compressa

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Small gudgeon with striking red-orange fins and a blue-green iridescent body. Comes from cool-water streams so prefers lower temperatures. Can be kept in a subtropicaltank.

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Endler's Livebearer

Poecilia wingei

fishfreshwater

Endler's livebearers are related to guppies but smaller and with more intense, contrasting colouration. Males display striking neon patterns and are constantly active. They breed readily in captivity and make an excellent choice for nano planted tanks.

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False Julii Corydoras

Corydoras trilineatus

fishfreshwater

Commonly sold as julii corydoras, C. trilineatus has spots that merge into broken lines along the body. It is extremely popular in the hobby due to its attractive pattern and ease of care. Active during the day and peaceful with all tankmates.

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False Rummy Nose Tetra

Petitella georgiae

fishfreshwater

Nearly identical to the true rummy nose but slightly less demanding. Red nose, silver body, and black-and-white striped tail. Schooling fish that looks spectacular in groups of 12+.

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Flame Moss

Taxiphyllum sp. 'Flame'

plantfreshwater

Flame Moss gets its name from the way its upright, twisted stems spiral and curve upward — resembling flickering orange flames when viewed in flowing water. Unlike most mosses that grow laterally, Flame Moss grows vertically, making it uniquely suited for mid-height mounding effects on rocks and wood. It is slow growing but compact, rarely requiring trimming, and stays tidy in low-flow areas.

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Florida Flagfish

Jordanella floridae

fishfreshwater

Stunning killifish native to Florida whose flanks mimic the American flag. Hardy algae-eater that tolerates cool water. Great for subtropical and unheated tanks.