Arapaima vs Common Goldfish

Arapaima gigas 与之比较 Carassius auratus

Taxonomy & Classification

属性	Arapaima	Common Goldfish
学名	Arapaima gigas	Carassius auratus
目	Osteoglossiformes	Cypriniformes
科	Arapaimidae	Cyprinidae
Conservation Status	Data Deficient	Least Concern

Physical Traits

属性	Arapaima	Common Goldfish
最大体长	450.0 cm	45.0 cm
最大体重	200.0 kg	2.0 kg
体色	Dark olive-gray to grayish-black back with large scales that become vivid red-orange with black borders on the posterior flanks; belly pale cream; caudal fin reddish and rounded.	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.

Habitat & Environment

属性	Arapaima	Common Goldfish
水质类型	Freshwater	Brackish
栖息水深	—	0-20m
地理分布	Restricted to the Amazon River basin in Brazil, Peru, Guyana, and Bolivia. Inhabits flooded várzea lakes, oxbows, and large river channels; surfaces frequently to breathe …	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 …
栖息地	Floodplain lakes (várzea) and large river channels of the Amazon basin. Slow-moving, shallow, warm freshwater (26-30°C). An obligate air-breather; rises to surface to gulp air. …	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 …

Aquarium Suitability

属性	Arapaima	Common Goldfish
最小水箱尺寸	—	150 L
水温	—	10-24
pH 范围	—	6.0-8.0
饲养难度	—	Easy
性情	—	Peaceful

钓鱼信息

属性	Arapaima	Common Goldfish
游钓鱼种	是	是
搏鱼评级	10/10	—
世界纪录	—	—
汞含量	—	—

Cuisine & Edibility

Arapaima

Large, firm white fillets with a mild, clean flavor and low fat; historically a staple protein in Amazonian communities. Often salted and dried; sustainable harvest is tightly regulated.

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.

Species Overview

Arapaima

The arapaima is one of the largest freshwater fish in the world, reaching up to 4.5 meters. An obligate air-breather, it must surface every 10-20 minutes to gulp air. Its tongue is bony and used to crush prey against the roof of its mouth.

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.