White-tailed eagle more vulnerable than many. Besides vulnerability, habitat and prey behaviour, fish body size may be a driver in the piscivorian dietary preferences. Studies have indicated that fish less than are taken infrequently, since they have a lower yield, fish of up to are taken secondarily and fish between are preferred since they have the highest nutritional benefit. Fish taken can exceed but since they can start to considerably exceed the weight of the eagle itself, they may be prove too difficult to overpower. One large Atlantic halibut ("Hippoglossus hippoglossus") was found with the disembodied feet of a white-tailed eagle still
Fourhorn poacher more commonly reach a TL of . The maximum recorded weight is , and the maximum recorded age is 7 years. The fourhorn poacher is preyed on by "Hippoglossus stenolepis". Its own diet consists of crustaceans including shrimp, crabs, isopods, amphipods, and ostracods, as well as bony fish, gastropods, and polychaetes. Fourhorn poacher The fourhorn poacher ("Hypsagonus quadricornis", also known as the four-horned sea-poacher) is a fish in the family Agonidae (poachers). It was described by Achille Valenciennes in 1829, originally under the genus "Aspidophorus". It is a marine, temperate water-dwelling fish which is known from the northern Pacific Ocean,