Indian glassy fish

Indian glassy fish key facts

Care level

Beginner-friendly

Lifespan

Few reliable data

Size

Up to 9.5 cm TL (FishBase)

Temperature

20〜30℃

Diet

Omnivore leaning to meaty foods (frozen/live foods, prepared foods)

Water Temperature & Quality

20-30°C, pH 7.0-8.0, 9-19 dH (FishBase). Can be kept in fresh or slightly brackish water.

Aquarium

FishBase recommends groups of five or more in at least a 60 cm tank. It is shy, so plant some areas densely and add floating plants; a dark substrate helps it settle and colour up.

Tank Mates & Compatibility

Peaceful and shy, so avoid boisterous or aggressive fish. In fresh water it can live with barbs, livebearers and small rainbowfish. It does poorly kept singly or in pairs.

Diet & Feeding

Accepts most live, frozen and dried foods; in the wild it eats small invertebrates and crustaceans.

Breeding & Egg-laying

Eggs are laid among plants and hatch in about 24 hours. Fry wait for food to drift past rather than hunting, which makes them hard to raise.

Cautions

Do not buy dyed fish. Listed as an invasive alien species in Japan, so never release it into the wild.

About Indian glassy fish

The Indian glassy fish is a small, transparent tropical fish. Males have blue-edged dorsal and anal fins. It adapts from fresh to mildly brackish water, does best in a group, and suits beginners. Maximum length is 9.5 cm.

7 things to know before welcoming a Indian glassy fish

1. 1See-through body, blue-edged males

   Its defining feature is a body so transparent that the skeleton and internal organs show through. Under good lighting you can see its inner structure clearly. Males have blue edging on the dorsal and anal fins, which gives you one clue for telling the sexes apart.

2. 2A small fish, up to 9.5 cm

   Adults reach a maximum total length of 9.5 cm (FishBase), so this is a small fish. Because it is best kept in a group, it is reassuring to prepare a tank with enough room for everyone to swim freely.

3. 3Calmer when kept in a group

   This fish tends to settle down better in a group than on its own. A lone individual may stay restless or spend much of its time hiding. When you plan your purchase, it helps to prepare for bringing home several fish together.

4. 4Fresh to mildly brackish water

   It adapts to conditions from fresh water to mildly brackish water, and its care level is beginner-friendly. Even so, sudden changes in water quality or temperature are stressful. Take your time with acclimation after bringing it home.

5. 5Choose calm, similar-sized tankmates

   Because it is small and can be timid, it is safer to avoid large or aggressive tankmates. Pairing it with calm fish of a similar size makes it easier for the group to stay relaxed.

6. 6Feeding and health checks

   Offer food small enough for its mouth in modest amounts, and remove leftovers promptly. Because the body is transparent, changes such as a swollen or thin belly or marks on the skin are easy to spot. If something looks unusual, check the water quality first.

7. 7Never release into the wild

   In Japan this species appears on the list of alien species that can harm ecosystems. Never release a pet into rivers, ponds, or other natural waters. Bring it home only if you are prepared to care for it to the end, including planning for situations where you might no longer be able to keep it.

Frequently asked questions about Indian glassy fish

Q.Can beginners keep Indian glassy fish?

A.Yes, its care level is beginner-friendly. It adapts to a wide range from fresh to mildly brackish water and settles down when kept in a group. Still, avoid sudden changes in water quality or temperature, and acclimate it carefully.

Q.How large do they grow?

A.It is a small fish with a maximum total length of 9.5 cm (FishBase). Individuals vary, so treat this figure as an upper guide. It is wise to choose a tank with room for a group to swim.

Q.Can I keep just one?

A.Since this fish settles down best in a group, keeping several together is recommended. A single fish may feel unsettled and tend to hide.

Q.Is fresh water enough, or do I need brackish water?

A.It adapts to conditions from fresh water to mildly brackish water, so brackish water is not a requirement. Either way, avoid sudden changes and let the fish adjust gradually.

Q.How long do they live?

A.There is little published information on lifespan, so we cannot give a reliable figure. To keep your fish healthy over the long term, maintain stable water quality and observe it closely every day.

Useful tools for Indian glassy fish care

Learn more about Indian glassy fish in the encyclopedia

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