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The puffer over time will try to eat just about any invert in the tank. I wouldn’t add a $20 shrimp but I have had friends with limited success with small hermits.
I've noticed that as long as I keep my blue spot fed well, he leaves my inverts alone! Just as soon as I miss a day feeding... a snail shell ends up empty or a peppermint shimp looses a head :0 moody lil guy but very cool addition!
I don't know about that particular puffer but I have a GSP in a community tank. Well it's brackish with a crawdad and a bunch of bumblebee gobies along with the puffer, also tons of ghost shrimp. I'd just say find fish that are quick enough to get away from him. Also make sure there are hiding spots for the fish in the tank.
I had hermits and astrea snails with my toby and dog face and they were fine. The blue spot will not get big enough to break any good sized snail shells. So some scarlet hermits would be a good choice and some snails would be good also. If he eats one a month that no big loss ,which I don't think it will do. Let me say my DF was only 4" so he was not large enough to crunch larger shells. IF you want a shrimp start with a cheap peppermint to see how he makes out.