Originally Posted by cortlan
are you saying i could have like 3 pairs of fish . :joy: how about 5 blue reef chromis
No.
By "footprint" ophiura meant the size and shape. Your tank is higher than it is front to back or side to side.
Different types of fish have "areas" of the water that they are best suited for and where and how they feed, what territory they will want to claim. For instance, chromis like the middle and top levels (most damsels fish do), blennys and gobys like the bottom level.
Because of the shape of your tank, you need to almost consider it as if it were 3 separate tanks. The top level is, for example, 1 15 gallon, the middle level is another and the bottom level is another.
To stock it for the health of your fish, you can choose, say, 2 fish per level. 2 that will dwell mostly in the substrate and lower areas, 2 that will stay mostly in the middle/top and 2 in the top/middle.
You will need to research your fish with those limits in mind to avoid feeding and territory issues.
It will also make your tank more pleasant to look at, with activity on all levels.
Keep us posted!