Hemigrammus Diagonicus

📖 Overview

Hemigrammus Diagonicus (Hemigrammus diagonicus), first described by Mendonça & Wosiacki, 2011 is a tiny fish in the family Acestrorhamphidae (order Characiformes). Adults typically reach 2.80 cm in maximum length. It inhabits freshwater systems including rivers, streams, and lakes. It occurs in Tropical waters. It is broadly omnivorous, taking invertebrates, plant matter, and detritus. On the IUCN Red List, it is classified as Least Concern.The species is kept in the aquarium hobby. Care requirements and behaviour align broadly with other Acestrorhamphidae kept in the hobby.

🔬 Taxonomy

🐟 Physical Description

Hemigrammus diagonicus can be easily differentiated from its congeners, except for Hemigrammus silimoni, by the presence of a blotch on the caudal fin restricted to the dorsal lobe (vs. no blotches on the caudal fin, blotches restricted to the base of the rays, or blotches arranged symmetrically in dorsal and ventral lobes). Hemigrammus diagonicus is distinguished from H. silimoni by the autapomorphic presence of the caudal-fin blotch shaped like a bar that extends diagonally from the base of the median rays to the end of the upper lobe rays (vs. conspicuous ocellus like blotch on the lower region of the caudal-fin dorsal lobe); height of dorsal fin 22.3–30.2% SL (vs. 31.0–37.4% SL); length of anal-fin base 24.0–28.0% SL (vs. 28.7–31.5% SL); horizontal eye diameter 33.8–41.3% HL (vs. 43.4– 48.1% HL) .

🌀 Behaviour

Behavioural data for Hemigrammus Diagonicus is currently being reviewed.

🦐 Diet

🥚 Reproduction

🌍 Habitat & Distribution

Freshwater; benthopelagic. Tropical; 2°S - 3°S, 55°W - 57°W South America: Brazil.

🌿 Ecology

📐 Morphometrics

🌡️ Water Parameters & Tolerance

🛡️ Conservation Assessment

📊 Population Risk & Fisheries

🦠 Common Diseases

The following diseases are known to affect Hemigrammus Diagonicus.

🐠 Related Species

🔍 Similar Species

👥 Community & Contribute