Yep.. thats right Graeme, thats how they hide. Sometimes they are completely covered except for the eyes(I guess that might be from the sand thats being washed over them when they're in the river). I was never able to find the bigger ones. The ones that I caught were about 2" - 2.5". The biggest one is now about 3.5 inches.
The water level at the spot where i caught them was about a foot deep. I'll try to get pics of them when go back to my hometown. Thats where I have the pond.
There are a lot of other varieties of loaches here too. In fact when i used to purchase fish for the pond, my dad used to say that there used to be a lot of fish in kerala back in the early 1950's that resembled Yo-Yos and Zebras in terms of shape and behaviour. But now it seems many of them are not even seen anymore.
Kerala itself houses about 350 different species of freshwater fish. And I've read about sevaral varieties of loaches at the university a long time back. I don't remember the scientific names though. Maybe when I take the next long break from work, I'll try to travel around kerala on a loach expedition.
