📸 PhotoPhoto: Patrick Farrelly · Public domain · Wikimedia Commons Source
Blue discus
Symphysodon aequifasciatus (Blue discus · Blue discus)
💡 Everyday Comparisons for Size, Mass & Speed
- 💡 Its maximum standard length of 13.7 cm is about 1.6 times the long side of a credit card (8.56 cm) (Comparison).
- 💡 In aquariums, keeping it in groups of 5 or more in a tank at least 120 cm long is recommended (FishBase).
- 💡 It is traded as an aquarium fish (FishBase).
Reference standards: coach bus ~12 m, mid-size car ~4.9 m, compact car ~1 t, basketball hoop 3.05 m, credit card 8.56 cm.
📖 1. Overview
The blue discus is a freshwater fish of the cichlid family living in the lower and eastern Amazon River. It is widely traded as an ornamental fish.
🦴 2. Anatomy & Morphology
FishBase only lists a maximum standard length of 13.7 cm without describing its body shape in detail. It lives in water with a pH of 5.0–8.0 and temperatures of 26–30 °C.
🔍 3. Ecology & Behavior
It normally forms schools but defends territories during the breeding season. It feeds on small invertebrates such as insect larvae, insects, and plankton.
🇰🇷 4. Connection to Korea
No direct record connecting this species to Korea has been found.
📚 Sources & References
- • IUCN Red List LC (2022) — https://www.iucnredlist.org/species/49830657/141105884
- • IUCN Red List category LC — latest assessment at iucnredlist.org
- • catalogueoflife.org — 53QBZ
- • iucnredlist.org — 141105884
- • wikidata.org — Q3091839
- • commons.wikimedia.org — File:Blue Discus.jpg
- • fishbase.se — Symphysodon-aequifasciatus.html
- • Silhouette: PhyloPic — Cee Nell · CC0 1.0 (Related taxon silhouette — Cichlidae)
Recorded dimensions are widely cited representative estimates from public literature and may vary by study or specimen.