Dwarf Corydoras

Descrição

Corydoras hastatus, commonly known as the Dwarf Corydoras or Pygmy Corydoras, is a diminutive and highly social species of freshwater catfish belonging to the family Callichthyidae. Unlike most other Corydoras species that are primarily benthic, C. hastatus exhibits a more pelagic behavior, often schooling in the mid-water column. Its small size and peaceful nature make it a popular choice for nano aquariums and community tanks. This species is characterized by a distinctive black spot at the base of its caudal fin, often flanked by iridescent gold or silver markings.

Características físicas

Formato do corpo

elongated

Coloração

The body is generally silvery-grey to olive-brown, with a prominent, elongated black spot or stripe at the base of the caudal fin, often extending onto the fin itself. This spot is typically bordered by iridescent gold or silver patches, especially noticeable under certain lighting. The belly is lighter, often whitish. Fins are hyaline (transparent) to slightly dusky.

Tipo de escama

none

Posição da boca

inferior

Características distintivas

Smallest species within the genus Corydoras, typically reaching a maximum standard length of 2.5-3.0 cm (1.0-1.2 inches)., Possesses a distinctive black, spear-shaped spot at the caudal peduncle, which is the primary identifying feature., Unlike most Corydoras, they often swim in the mid-water column and are less strictly benthic., Two pairs of short barbels around the mouth.

Nadadeira dorsal

Single dorsal fin, typically with one spine and 7-8 soft rays. The spine is relatively short and often serrated.

Nadadeira caudal

Forked caudal fin, with the distinctive black spot at its base.

Nadadeira peitoral

Pectoral fins are relatively small, with a spine and several soft rays. The pectoral spine can be locked for defense.

Nadadeiras características

Adipose fin present, small and typically clear.

Dicas de identificação

Habitat

Tipo de água

freshwater

Profundidade

Typically found in shallow, slow-moving waters, often near the banks of rivers, streams, and tributaries.

Ambiente

Prefers clear to blackwater environments with dense vegetation, submerged roots, and leaf litter. The substrate is usually soft, consisting of sand or fine silt. They are often found in areas with moderate current, but also in calmer backwaters.

Distribuição geográfica

Native to South America, specifically found in the Paraguay River basin (Brazil, Paraguay, Argentina) and parts of the lower Amazon basin (Brazil). Records also exist from the Rio Guaporé (Brazil/Bolivia).

Informações sobre aquário

• Nível de cuidado: intermediate
• Temperamento: peaceful
• Alimentação: omnivore
• Tamanho mínimo do aquário: 38 liters (10 gallons) for a small school
• Temperatura: 22-26°C (72-79°F)
• Nível de pH: 6.0-7.5
• Dureza da água: 2-15 dGH
• Compatibilidade: Excellent for community tanks with other small, peaceful fish such as small tetras, rasboras, and other dwarf Corydoras species. Avoid housing with large or aggressive fish that may view them as prey.
• Requisitos especiais: Requires a well-planted aquarium with fine substrate (sand or smooth gravel) to protect their delicate barbels. They thrive in schools of 6 or more individuals, exhibiting more natural behavior and reduced stress. Good water quality and regular water changes are essential. Provide plenty of hiding spots among plants and driftwood.

Informações no ambiente natural

• Estado de conservação: least concern
• Sazonalidade: No specific seasonal behavior patterns are widely documented for wild populations regarding availability or breeding, as they are continuously present in their habitats.
• Preço de mercado: Low to moderate, depending on region and availability.
• Importância comercial: medium
• Sabor: Not typically consumed due to their small size.
• Textura: Not typically consumed due to their small size.
• Valor nutricional: Not typically consumed due to their small size.

Fatos principais

Espécies similares

Classificação científica

Reino

Animalia

Filo

Chordata

Classe

Actinopterygii

Ordem

Siluriformes

Família

Callichthyidae

Gênero

Corydoras

Espécie

Corydoras hastatus

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