“Halibut is a flatfish from the family of the right-eye flounders (Pleuronectidae).
Other flatfish are also called halibut. The name is derived from haly (holy) and
butt (flat fish), known for its popularity on Catholic holy days. Halibut are demersal
fish which live in the North Pacific…. They are highly regarded food fish.” - Wikipedia
Here’s what Wikipedia forgot: THEY GET FREAKIN’ HUGE!!!