Common Goldfish vs Oscar

Carassius auratus との比較 Astronotus ocellatus

Taxonomy & Classification

属性	Common Goldfish	Oscar
学名	Carassius auratus	Astronotus ocellatus
目	Cypriniformes	Cichliformes
科	Cyprinidae	Cichlidae
Conservation Status	Least Concern	Least Concern

Physical Traits

属性	Common Goldfish	Oscar
最大体長	45.0 cm	45.0 cm
最大体重	2.0 kg	1.6 kg
体色	Brilliant orange to deep golden-yellow body with a metallic sheen across all scales; domesticated forms range from white, yellow, and red to black and calico bicolor combinations.	Dark olive-brown to blackish body with irregular wavy orange-red markings forming a marbled or reticulated pattern; prominent black ocellus with orange ring at the upper tail base.

Habitat & Environment

属性	Common Goldfish	Oscar
水質タイプ	Brackish	Freshwater
生息水深	0-20m	—
分布域	Originates from rivers and lakes of eastern China and possibly Korea; domesticated for over 1,000 years. Wild relatives inhabit slow rivers, ponds, and slightly brackish …	Native to the Amazon and Orinoco river basins in South America, including Peru, Colombia, and Brazil. Inhabits slow, deep, turbid rivers, flooded forests, and large …
生息地	Ponds, lakes, slow rivers across East Asia; introduced worldwide. Tolerates wide temperature range (10-30°C) and turbid water. Prefers shallow, vegetated areas with soft substrates. Domestic …	Slow-moving rivers and floodplains of the Amazon and Orinoco basins, South America. Warm, murky water (22-28°C, pH 6-8). Inhabits areas with submerged logs and dense …

Aquarium Suitability

属性	Common Goldfish	Oscar
最小水槽サイズ	150 L	280 L
水温	10-24	22-25
pH 範囲	6.0-8.0	6.0-8.0
飼育難易度	Easy	Moderate
気性	Peaceful	Aggressive

釣り情報

属性	Common Goldfish	Oscar
ゲームフィッシュ	はい	はい
ファイト評価	—	—
世界記録	—	—
水銀含有量	—	—

Cuisine & Edibility

Common Goldfish

Not consumed — a classic ornamental aquarium and pond fish; its vivid color and hardy nature make it one of the world's most popular decorative species.

Oscar

Not consumed — popular ornamental cichlid kept for its bold patterning and personality; occasionally eaten in parts of South America but primarily an aquarium species.

Species Overview

Common Goldfish

The goldfish was one of the first fish to be domesticated, with selective breeding in China dating back over 1,000 years. Despite common misconceptions, goldfish can live 10-15 years with proper care and require far more space than a small bowl.

Oscar

The oscar is a large, intelligent cichlid native to the Amazon basin. Known for its dog-like personality, it can recognize its owner and may beg for food. Oscars rearrange their tank decor and require spacious aquariums with robust filtration.