but a moderator is a person with experiance,
As a mod, I think I need to address this at least somewhat. While one of the functions a mod should do would be to settle disputes, I think that you can't take their word as gospel or anything. Just like anyone, a good post will provide reasons and sources, especially if asked. Someone with no experience can make a post as good as someone with 80 years of experience, so long as the info is right.
A mod's job, more than anything else, is to moderate the forum. Not necessarily be the most experienced or best at answering questions or anything like that. Mods go the "housework" of the forum. Remove spam, move threads that fit better into other sections, and take care of members who get out of line. If life and people were perfect, there would be no such thing as mods, because most of the stuff we have to do is taking care of things that aren't following the rules. To be frank about it, you don't have to know are darn thing about fish to perform these duties well.
I think what you are thinking of is awarding someone a title like "resident expert" or "fish expert" or something like that. There are some forums out there that award titles like these to their most knowledgeable and helpful members, but these members have no mod powers of the like I mentioned above.
Now, to the OP. In light of what most of the mod duties are, have these not been done well enough in the Livebearers section? Has there been spam or unruly members? If so, the very first thing is to hit the report button on the offending posts. This sends a PM to the mods so that they can be taken care of in a hurry.
But, if there haven't been enough experts in the section, then I'm not sure what we can do about that. We try our best to attract and keep the best people we can, but we can't force anyone to be an expert in any area nor can be force anyone to stay. We are all volunteers -- mod team and every single member. Maybe this could be an opportunity to become even more knowledgeable yourself about the fish and earn yourself the respect as one of the experts in that area.