Fiddler crabs with other animals?

Question

what are some fish and other small aquatic animals that will do good with fiddler crabs in an aquarium.

Answer 1

Compatibility
These Crabs will quarrel among themselves, so be sure each one has plenty of room and don't crowd too many in the same aquarium. One Crab per square foot of bottom area is enough. So, for example, a standard 10 gallon aquarium would have about 2 Crabs. A larger 40 gallon aquarium has about four square feet of bottom area, which is room for about 4 Crabs.

We received an email that said when they looked at the picture at the top of this page, they saw that we were in obvious violation of our own advice about how much space each Crab needs.

They're right. You should give each Crab about one square foot (12" x 12") of bottom area, or crowd them together like we did in the photo above, which seems to neutralize their territoriality and aggressiveness. This is also true of many fish. Give them plenty of space or crowd them to reduce fighting.

Since most of the people reading this page are aquarium hobbyists and will keep just a few Crabs, it's best if each Crab has at least one square foot of bottom area. We are dealers and keep hundreds of Crabs. These Crabs do fine the way we keep them as shown in the picture at the top of this page.

Compatible Tank Mates
These small Crabs seem to be too slow to catch most fish. The Crabs wave their claws at fish but don't ever seem to catch a fish, unless the fish is sick and crashed on the bottom.

The Crabs don't seem to bother Plecostomus Catfish. The Plecos. just swim away and hang on the side of the aquarium above the Crabs.

The Crabs will bother and sometimes eat African Dwarf Frogs and Ghost Shrimp. Some types of Puffer Fish will attack and eat Crabs.

Click here to read more about several other groups of compatible fish."

Answer 2

They're best kept by themselves. For one thing, fiddlers do best when you add some salt to their water, since they come from tidal flats where saltwater mixes with freshwater.

They also should have a spot where they can get completely out of the water. This means either a rock or piece of driftwood that sticks up out of the water, or a divider of some sort with sand behind it to make a "beach".

Answer 3

Don't mix them with fish or other animals. If you don't know how to keep them, do plenty of research before getting them.