Glass Catfish: A Fish You Can See Straight Through

In this guide

Overview

The glass catfish has a genuinely transparent body, with its skeleton and internal organs visible through the skin, leaving only the head and organs as solid, visible structures against an otherwise see-through silhouette. It comes from Thailand and nearby parts of Southeast Asia and reaches around eight to ten centimetres.

It is a true shoaling fish, and this matters more here than with almost any other fish on this list: a glass catfish kept alone or in too small a group becomes visibly stressed, often shown by a curved or bent spine that does not occur in a properly shoaled, settled fish.

Tank and water requirements

A group of six or more, ideally more, does well in a tank of eighty litres or more, with gentle water flow and subdued lighting that echoes its natural shaded river habitat. It is sensitive to poor water quality and sudden parameter changes, and does best in a mature, well-established tank rather than a newly set up one.

Good filtration and stable water chemistry matter more for this species than for many other community fish given its genuine delicacy.

Diet and behaviour

Small live or frozen foods such as daphnia and brine shrimp are readily accepted, alongside high-quality micro pellets once the fish are settled. Newly bought glass catfish can be reluctant to eat prepared food at first, so live or frozen options are often needed to get them established.

It is entirely peaceful and does best with equally calm, similarly sized community fish, since boisterous tankmates can stress this naturally delicate species.

Buying tips

• Priced around forty to one hundred rupees per fish in most Indian shops that stock this specialty species
• Buy the full intended group at once, at least six, since undersized groups reliably lead to stress and spinal curvature
• Ask about the shop's water conditions and how long the fish have been in stock, given this species' sensitivity to sudden change

Article content © Ravi Teja. All rights reserved.