Humphead Glassfish Care Guide - Aquarium Setup, Diet & Breeding

Humphead Glassfish are striking, transparent-bodied fish with a distinctive raised forehead and a laterally compressed shape. Their glass-like appearance allows the outline of the backbone and internal organs to be seen, while the fins often carry subtle dark or reddish markings that become more noticeable as the fish mature.

Unlike the delicate reputation suggested by their name, this species is an active and capable swimmer when settled in a suitable aquarium. They are peaceful by nature and display their best behaviour when kept in a social group, where they regularly move together through open water and around plant cover.

In the wild, Humphead Glassfish are associated with clean freshwater habitats in Southeast Asia. Their natural environment includes flowing water, rocky margins, submerged branches and patches of vegetation, creating a mixture of open swimming space and shaded shelter.

Parambassis pulcinella is sometimes confused with other glassfish sold in the aquarium trade, including species that are marketed as brackish-water fish. Humphead Glassfish are a freshwater species and do not need salt as part of their routine care. Their unusual profile and transparent body make them an appealing choice for a peaceful community aquarium.

Humphead Glassfish are native to Southeast Asia, particularly river systems in Myanmar and adjoining western Thailand. They inhabit freshwater streams and rivers, including clear, flowing sections with rocky areas and submerged cover.

A group should be given an aquarium of at least 100 litres, with a footprint of roughly 90 by 30 cm or larger. Use a fine gravel or sand substrate, arrange smooth stones and branches to suggest a stream environment, and include hardy plants or shaded areas for security while retaining an open central swimming zone. Efficient filtration, good oxygenation and gentle to moderate water movement are beneficial, and a secure lid is sensible because these active fish can jump.

Up to 10 cm (4 inches) in adult length. Males may become slightly larger and more robust than females, although aquarium specimens are often closer to 7–9 cm (2.8–3.5 inches).

Offer a varied diet of suitably sized flakes and small sinking or floating pellets supplemented with frozen or live foods such as brine shrimp, daphnia, bloodworm and mosquito larvae. They often respond especially well to moving foods, but should be gradually accustomed to a good-quality prepared diet. Feed small portions once or twice daily and remove uneaten food promptly.

Humphead Glassfish can be kept with other peaceful, similarly sized community fish such as small rasboras, danios, peaceful barbs, larger tetras, kuhli loaches and small Corydoras. Avoid boisterous, predatory or fin-nipping species, including large cichlids, aggressive barbs and many larger freshwater predators. Very tiny fry and newly hatched shrimp may be eaten, although adult ornamental shrimp are generally less vulnerable.

Humphead Glassfish are egg scatterers that can spawn among fine-leaved plants or other dense cover. Condition a group with varied live or frozen foods, provide clean, well-oxygenated water and gentle flow, and watch for eggs deposited among vegetation. Adults may eat the eggs and fry, so a separate breeding aquarium or removal of the adults is advisable. The tiny larvae require appropriately sized infusoria or other microscopic first foods before they can accept larger baby foods.

Mature males are usually somewhat larger and more strongly built, with a more pronounced forehead hump and brighter fin markings. Females tend to have a rounder abdomen, particularly when carrying eggs, and a less prominent head profile.