It seems like it might be, they're very insular, but it's unusual.
I wasn't sure so I thought I'd make a post about it and see what other people thought rather than a mantis ticket.
I'd quite like to see more in the boarines' interplanetary relations action set anyway though - you already have to get up to 60 influence to even ask about those, and then maybe trading from them would be very much more expensive than other races, and perhaps lose you influence every time you suggested it? I think something like that would be better than outright forbidding it.
How about everyone else?
Edit: A little further on, and the Boarines are attacking the Peltians without actually being 'at war' with them - they're friendly, apparently. Yet, if I defend the Peltians against what the regent must claim are merely opportunistic captains trying their luck, my influence with the Boarines in generally reduces as if I had aided a race properly at war with them (and the explanation is -10 Opposed in war).
I can't even persuade the boarines to stop attacking the peltians, because the boarines lack almost all of the standard diplomatic options. I would love some opinions on whether they should outright have none of these options.