H. krishnai is a blind catfish inhabiting the dug-out wells at Kottavam Kerala, South India. Studies on the alimentary tract of the fish show that, the alimentary tract, though typically teleostean, shows several adaptive modifications. The bulbous stomach helps in storing food which is helpful in an environment chronically deficient in food. The ileo-rectal sphincter helps in retaining the digested food in the intestine for a long duration to facilitate maximum absorption. This is very helpful as the intestine is short. The liver is well developed.
Mercy, T. V. Anna and N. Krishna Pillai.
The anatomy and histology of the alimentary tract of the blind catfish Horaglanis Krishnai Menon.
International Journal of Speleology,
Available at: http://scholarcommons.usf.edu/ijs/vol14/iss1/8