Dear Phillip, From a Newbie to a Stranger, welcome.
In answer to your question, the character in your book would be more believable if you describe him as a "paleontologist specializing in ichthyology". Few paleontologists are funded to such a narrow degree. But if you insist, use "paleo-ichthyolgy" as hyphenized, "paleoichthyology" might qualify as one of the ugliest appearing words in the english language.
Good-bye Philip, (or had you rather be called "pgwynne"). Best of luck with your book.
Milum.

PS: Do not confuse those porn sites you visited with this board. Even though threadlines like this one sometimes degenerate to the basest of comments, we have a devise called "Jackie, the gutter queen" who will quickly put things back in place.
PPS: Speaking of porn sites...uh, did they have one about uh...oh well, forget it.