iave read online about blue spot shearing its den with a certain kind of shrimp or crab / and iave also read that it can eat them too any info looking for a buddy for my blue spot?
I never heard of any jawfishes sharing a den with a shrimp or crab.You have the wrong type of fish. I can not remember the type of fish that you are looking for right now. I sure some one else would know.
Watchman gobies bond with shrimp, the shrimp are blind and rely on the fish for protection. Hence the name watchman. Jawfish will eat small crabs and shrimp or at the very least harrass them.
The watchman goby acts as the "eyes" for the pistol shrimp. If anything happens the goby moves and the shrimp, who keeps one antenna on the fish at all times, knows to retreat into the burrow. If push comes to shove and whatever danger there is decides to investigate the burrow, the pistol shrimp unleashes with his "pistol" on their assailant.