so today i went to a few loack ( not really local but as close as they are) pet stores, i like the sally light footed crab. but seems 3 of 4 all had diffrent info on them, i tried goodle but couldnt find any profiles on them. please any info would be good

i have a 30 gallon bio cube.
also a coral banded shrimp ( not sure thats what it was called )
whould i be able to have other shrimp? would it bother hermit crabs or anything? if possible to have in a 30 gallon, and the sally lightfooted crab would they be ok? are they ok with clown fish? any info would be great
cholate chip star fish?
0 info on google, i dont kno if i cant read or someting lol but i couldnt find anything! . . . . . i need a book on inverts! thank you for an info tho