Thats reassuring that LA is reliable. They do have a basic compatibility chart but as you said that isnt truly the behavioral interaction.
I understand being on the conservative side for sure, and for lots of new people on here I can understand how it would be annoying/shocking being told an eel, nemo, dori, mandarin and a sea horse wont get along together in a 20 gallon tank :lol:. especially after cycling your tank for months. But I don't want to create anymore unnecessary stress for any animals that have to remain in captivity. One idea I have toyed with though is making a peaceful tank then introduce predators and build it up to an aggressive tank. Yeah that would be an expensive couple of meals but we'll see if I'll be able to sacrifice the animals in a couple years time.
Personally, as of now, I don't get distraught when a fish dies unless I really could of prevented it. I feel like an idiot for doing something wrong though, and do feel bad that they could have lived much longer. For instance, I hooked up my homemade sump to soon and the silicon leaked ammonia and killed 3 damsels when my tank was on the last leg of cycling.
back on track:
You mentioned that a skunk shrimp and goby do not have a commensal relationship. They both eat meaty foods right, so wouldnt that be commensal? Or maybe I don't understand the reefers meaning of commensal. Do I need a omnivore for a commensal relationship? What makes a shrimp commensal with the goby? Would camel shrimp fulfill that?