I'm aware of the "only use 1% of what you research in your novel" rule, but I have a narrator who is an enthusiastic marine biologist and was wondering if it would be alright for him to periodically throw in some facts? I'm much more of a plotter/planner than a seat-of-the-pants writer, but I tend to like to think about the voice of the character I will be writing and write a first draft of the opening scene early on.

In the opening scene he is scubadiving with two others and begins to describe the fish to the readers, casually throwing in their scientific name and pointing out the way their bodies are perfectly equipped to dash through the water. Of course he wouldn't go into great depths explaining something like computer coding, another thing I'm researching for the story, because he knows nothing about it. Nor would he go on for paragraphs about where the fish fit in the trospheres. Rather little sentence-long facts that naturally bleed into his narration. Would this be an exception to the research rule, or should I cut it and get straight to the point?