It’s highly likely that the 3 true blennies will fight eachother to the death. Chances are high that the bicolour would survive which may be an issue with the two existing watchman gobies. Cryptocentrus species are nasty when it comes to protecting their dens and will fight off fish from their own den as they age. Juveniles are sweet and harmless but the adults are boisterous. Also, the 3 true blennies you have, none of them are totally reef safe. They all potentially nip coral for the calcium needs, Escenius and Meiacanthus are the worst for nipping LPS/SPS corals and Salarias are known for it but less likely to do it than the other two.
This leaves the Pseudochromis porphyreus, Nematodes magnifica and Synchiropus ocellatus. The Pseudochromis porphyreus will risk aggression towards the existing Gramma loreto trio, potentially killing them off.
The Nematodes magnifica is a very timid species that doesn’t do well with any aggression. These also have a high tendency to jump out when shown too much aggression. And since this will be one of the last fish added into a semi-aggressive tank, it’s likely to not work out.
Last but not least, Synchiropus ocellatus… this is not a true blenny. In fact it’s very closely related to the Psychedelic and Blue Mandarins. Which means that this will need a HUGE pod population. Mandarin Dragonets go through 1000s of pods in just a day, I believe the average amount of pods a day is 1500, so if we do the maths, 1500 x 7 that’s atleast 10,500 pods eaten in a week. So you’ll want to have Atleast a 3 year old 40B before thinking about this family.
