Common Goldfish vs Oscar

Carassius auratus comparado com Astronotus ocellatus

Taxonomy & Classification

Atributo	Common Goldfish	Oscar
Nome Científico	Carassius auratus	Astronotus ocellatus
Ordem	Cypriniformes	Cichliformes
Família	Cyprinidae	Cichlidae
Conservation Status	Least Concern	Least Concern

Physical Traits

Atributo	Common Goldfish	Oscar
Comprimento Máximo	45,0 cm	45,0 cm
Peso Máximo	2,0 kg	1,6 kg
Cor	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

Atributo	Common Goldfish	Oscar
Tipo de Água	Brackish	Freshwater
Faixa de Profundidade	0-20m	—
Distribuição Geográfica	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 …
Habitat	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

Atributo	Common Goldfish	Oscar
Tamanho Mínimo do Aquário	150 L	280 L
Temperatura	10-24	22-25
Faixa de pH	6.0-8.0	6.0-8.0
Nível de Cuidado	Easy	Moderate
Temperamento	Peaceful	Aggressive

Informações de Pesca

Atributo	Common Goldfish	Oscar
Peixe Esportivo	Sim	Sim
Classificação de Resistência	—	—
Recorde Mundial	—	—
Nível de Mercúrio	—	—

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.