Castes and Tribes of Southern India/Kappala
Kappala (frog). — An exogamous sept of Mādiga, and sub-division of Yānādis, who are said to be frog-eaters. It is also a gōtra of Janappans, who have a legend that, when some of their family were fishing, they caught a haul of big frogs instead of fish. Consequently, members of this gōtra will not injure frogs. I have seen frogs hanging up for sale in the Cochin bazār.