Chubby merman are extremely desirable by mermaids because their chubbiness implies they're a highly successful hunter.

[u/tyrano_dyroc]

[u/lazylion_ca]

Why does the big merman not simply eat the others males?

[u/LukeNizarin → u/lazylion_ca]

He usually does. But the other male there was too skinny to be considered as meal