Final regulations to implement ACA provisions, issued in 2013 by the US Department of Labor (DOL), said health-contingent wellness programs can vary group health plan premiums or cost sharing based on health status and will not be considered to discriminate based on health status if they meet five standards.
It's only a partial answer, but a Nile crocodile can eat up to half its body weight at a sitting, according to National Geographic. Since few freshwater fish weigh half as much as a crocodile, we can probably assume these croc feasts occur when they're able to ambush ungulates (e.g. zebras and antelope).
What would happen if you introduced Saltwater Crocodiles into an African river with Nile Crocodiles, and Nile Crocs into a river inhabited by ... Are there any fish that eat crocodiles? If a male Nile crocodile and male saltwater crocodile of average size and fully grown fought which would win? Why do crocodiles not eat other crocodiles? When was the Nile Crocodile exterminated from the banks of the Nile north of the Aswan High Dam?