In some specimens, dark areas formed of fluorapatite can be seen, which appear to represent soft tissue in a pattern congruent with the endophragmal skeleton of extant crayfishes.
It hunts fishes, crayfishes and cephalopods, but also feeds on dead animals.
Stomachs of eels less than 40 cm and captured in streams contained mainly aquatic insect larvae, whereas larger eels fed predominantly on fishes and crayfishes.
The stock of crayfishes is undocumented, but fishing using a maximum of ten tools is allowed with a fishing license.