Here's my 15 gallon tank.
Thus far I have:
-one yellow tailed damsel
-two emerald crabs
-one scarlet hermit crab
-two turbo snails
-one astria snail
-one mushroom polyp
and -one live rock (the tank set up was given to me by my cousin who accidently killed everything, so I just put his rocks that were once live back in after a good clean.
Eventually I hope to have coral everywhere and maybe even a clown with an anemone. :joy: