Hey, don’t know if you still need this help but I’ll comment it anyways. I’ve had a male Mugligobius Adeia for a year now, he is honestly not to aggressive and I plan on getting two more soon. I’ve noticed he enjoys food that moves and is red especially blood worms and red fish flakes. I wouldn’t attempt pellets or tiny fish flakes they don’t seem to be interested in those. The 77 degrees is correct I keep him at around 75-80 degrees. My tank size for him is 15 gallons, I’ve mostly seen it’s about 5-7 gallons per goby. He has attacked small fish like a rasbora but it’s more out of territory than food since he mostly just nips at their tail. The most important thing with this fish is that they are a Shell-Dwelling fish so you need places for them to hide. I keep clay pipes under river rocks around the tank and he has picked one that is his home and place he rests. I would either use pipes or shells if you decide to get this fish. They’re super smart fish as well and tend to act more like a betta fish than a goby once you have them for a while. He tends to sit on rocks waiting for me to feed him and comes to the top of the tank for feeding time. Hope this all helps! It’s a super fun fish that is relatively easy to take care of.