Indian Glassy Fish21/04/2021
The Indian Glassy Fish has an extraordinarily transparent body, revealing its bones and internal organs; the male develops a dark edge to the dorsal fin. The fish grows to a maximum overall length of 80 mm. It occurs in standing water, especially in impoundments, and it breeds prolifically during the rainy season. The species feeds on crustaceans, annelid worms, and other invertebrates. It is, in turn, prey for larger fish, including snakeheads.
Glass Fish has been kept in an aquarium for many years, but have a reputation for being delicate and difficult to keep. This may be related to a persistent myth that these fish need brackish water. In the wild, they more commonly inhabit freshwater, and in captivity do well in slightly soft to moderately hard dGH 7 – 19, slightly acidic to slightly alkaline water pH 6.5 – 7.5. They can tolerate a temperature range of 20 – 30 °C (68 – 86 °F).
These fish swim at the middle and lower levels of the tank and will take most small live and frozen foods. In general, they tend not to eat dried foods (such as flake). The fish reproduce by laying the eggs (females) and then the males fertilise the eggs.
Parambassis ranga is peaceful and shy and should not be combined with vigorous or aggressive species. The choice of tankmates is also governed by the type of water in which it is being kept. In freshwater conditions, it can be kept with barbs, livebearers, smaller rainbowfish, loaches and many other small tropicals. In the brackish aquarium, mollies, bumblebee gobies and chromides are all possibilities.
The Indian Glass Fish is a shoaling species and will not do well if kept singly or in pairs. Aim for a group of at least 6. Males do become somewhat territorial when spawning but physical damage is rare.
Males have blue edging to the dorsal and anal fins and are a slightly deeper yellow on the body than females. These differences are more apparent when the fish are breeding, as the colours become more intense. The swim bladder (which is clearly visible) has a pointed back edge in males.
Reproduction not too difficult, although the fry is difficult to raise. Provide the fish with a heavily planted aquarium of around 30″ x 12″ x 12″. Stock it with 6 – 8 adult fish. It is an advantage if the tank is situated so that it receives direct sunlight in the morning. Condition the group with high quality, varied diet. During this period, maintain them at a temperature of around 70 – 75°F. A pH around neutral should be fine.
When the fish are in breeding condition (look for an intensifying of the colours of the males, and round bellies on the females), perform a large water change with warmer water (around 80-84°F) in the evening. The fish should spawn the following morning. Each pair may deposit up to 200 eggs, and these will be found amongst the vegetation, stuck to plant leaves and stems. The adult fish can be removed at this point.
The eggs are very sensitive to fun guessing and the entire tank should be dosed with a weak solution of methylene blue, or similar, in order to prevent this. They will hatch in around 24 hours and will be seen hanging from the plants. They become free swimming in another 3 – 4 days. They are quite difficult to raise, as they do not actively seek food. Instead, they wait for morsels to drift by. We suggest feeding quite heavily with Brine Shrimp Nauplii and creating a slow current in the tank. Regular small water changes will be required in order to keep the water conditions perfect.