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Instantly access detailed profiles on thousands of fish species. Start by choosing a category or search for a specific fish.

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Image of Severum Cichlid (Heros efasciatus) fish

Severum Cichlid

Generally calm and tolerant cichlid that may show territorial behavior during breeding but remains manageable in spacious aquariums.

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Image of Orbigny's Freshwater Stingray (Potamotrygon orbignyi) fish

Orbigny's Freshwater Stingray

A benthic freshwater ray that is territorial, sensitive to water quality, and demanding in space and husbandry.

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Image of Spotted Sorubim (Pseudoplatystoma corruscans) fish

Spotted Sorubim

A powerful nocturnal predator that is highly territorial, intolerant of tank mates, and unsuitable for home aquaria.

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Environmental Indicator Species

In the wild, the presence of healthy Blue Acara populations often indicates stable water quality and balanced ecosystems. Their sensitivity to pollution mirrors patterns seen in species such as the Angelfish.

Community Tolerance Among Cichlids

The Blue Acara is one of the few cichlids that can coexist with the highly territorial Convict Cichlid under spacious conditions. This tolerance makes it popular in mixed Central and South American cichlid aquariums.

Relative of More Aggressive Cichlids

Although closely related to the Green Terror, the Blue Acara is significantly less aggressive. This genetic relationship highlights how small evolutionary differences can strongly influence temperament.

Parental Cooperation

The Blue Acara forms strong monogamous pairs and both parents actively guard eggs and fry, a trait shared with species like the Firemouth Cichlid. This cooperative behavior increases offspring survival in both wild and captive environments.

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Recent Blogs

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Lateral Line Erosion in Fish (LLE & HLLE): Causes and Prevention blog image

Lateral Line Erosion in Fish (LLE & HLLE): Causes and Prevention

Learn why aquarium fish develop LLE and HLLE, how to spot early warning signs, and what proven steps help prevent this common fish health issue.

By Fishmetry Team - January 22, 2026

Aquarium Care Guide: Filtration, Water Quality, and Fish Behavior blog image

Aquarium Care Guide: Filtration, Water Quality, and Fish Behavior

A complete aquarium care guide covering filtration maintenance, water parameters, tank size, temperature stability, and aggression control for healthy fish.

By Fishmetry Team - January 20, 2026

Best Freshwater Aquarium Fish for Beginners blog image

Best Freshwater Aquarium Fish for Beginners

A practical guide to hardy, peaceful freshwater fish ideal for first-time aquarium owners.

By Fishmetry Team - January 6, 2026

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