Sharks are considered fish of a certain type, in that they have a “full cartilaginous skeleton,” at least per Wikipedia. Contrast with bony fish (e.g., tuna, catfish). Also considered fish are stingrays and such.
This is more of a tangent than a response:
I would suppose that because we are more specific about the shark subset, we can safely make more assumptions on it. I’ve been told always that sharks were cold-blooded. According to that Wikipedia article, that is a false belief; most sharks are but some are not.
I would agree that it is a translation issue, because that’s what language lets people do when they talk/write/etc. But what about internally? What does it say now that I know some sharks (and therefore fish) are warm-blooded? I mean, besides getting pedantic and correct my daughter’s teacher when that comes up.
I would appear my previous definition of fish is wrong.
Edit: Removed so many supposes.
Because, as my daughter learned the other day, that still hurts. Also, the person could have been a non- or pre-op transsexual woman (leaving out other variants merely for brevity).
Maybe a different experimental method...
Edit: See also: Tim_Tayler’s comment above re: hidden prior.