We just started a saltwater tank. It's only ten gallons(yes we know it's small, Some people say 30+ Gallons, some say smaller.We know someone with a 5 gallon with seahorses in it). We want crabs, shrimp, and maybe a red serpant starfish. We have (so far) 2 emerald crabs (small),1 Red Leg Hermit Crab, an anemone crab (very small, and no we don't have an anemone) and a Banded Coral Shrimp. We also have 2 Three Strip Damsels and a live rock. Will these crabs, shrimps, and fish get along ? Will they get along with a star fish ? Any other pointers on crab care or info would be helpful. Thanks