Fiddler crabs are Brackish water-dwelling crabs, they could grow up to 1-2 inches in size if they live in the right condition. They are regarded as semi-aggressive animals, especially the male fiddler crabs because they could attack any tank mate they might have and also fight among themselves. Being a small creature and with some level of aggression, you may be wondering about the right tank size to keep them. In this article, you will learn about the tank sizes that could be able to contain different numbers of fiddler crabs.
How Many Fiddler Crabs Can I Put In A 10 Gallon Tank?
Fiddler crabs are semi-aquatic animals, this means they can live on both land and water. Although they make use of gills for breathing, but they still need to surface to take air and breath.
How many fiddler crabs can I put in a 10-gallon tank? 2 to 7 fiddler crabs can comfortably live in a 10-gallon tank.
As I mentioned above, they are not fully aquatic, so they need to surface to breath once in a while.
So, for you to keep them successfully, you need to have islands in their tanks where they will be staying and will sometimes go into the water.
What this means is that, although they are territorial in nature and they fight a lot among themselves, especially the males, but if you could add many islands In their 10-gallon tank, they will be able to live happily.
This is because not being fully aquatic, they stay more on land than on the water, so, they can’t survive without land.
So, if they happen to see some islands in their 10-gallon tank, they will each stay on their own and not disturb each other, unless occasionally.
So, with Islands and hiding places such as caves, etc, you could be able to House up to 7 fiddler crabs in a 10-gallon tank without having any issues.
How Many Fiddler Crabs Can I Put In A 20 Gallon Tank?
Crabs do need a lot of space to live comfortably in a tank, so, how many Fiddler crabs can I put in a 20-gallon tank?
A 20-gallon tank should be able to contain 8-12 Fiddler crabs if they are properly arranged.
Although it’s not advisable to keep any type of crabs in their numbers in just a single tank unless you have tanks to keep them.
I do advise against it unless you know what you are doing anyway.
Crabs are both territorial and aggressive, so, they will fight themselves if they live together in a tank.
But having them in a tank such as the 20-gallon tank with proper arrangements, you could achieve success.
As I mentioned above, the only ideal method of keeping groups of crabs like the Fiddler crabs together is to provide the requirements they need to be occupied and busy, thereby making them stay out of each other’s way.
The requirements fiddler crabs will need to coexist with each other in a small tank like the 20 gallons are caves, substrates, gravels, and islands.
Let’s say you are keeping 12 fiddler crabs in a 20-gallon tank, then you need to put in place 12 islands and caves too so, that they will stay on their islands and won’t have much time for each other because they are not fully aquatic and even when they stay in the water, They could at least stay in caves, gravels, etc, thereby staying out of each other’s way, etc.
How Many Fiddler Crabs Should Be In A 5 Gallon Tank?
A 5-gallon tank is one of the lowest tank sizes in the aquarium world so, how many fiddler crabs is advisable to have in such a small tank?
With proper tank settings, 3-5 Fiddler crabs could comfortably live in a 5-gallon tank.
Again it hugely depends on their sizes, as there is no way you could stuff 5 fully grown fiddler crabs that are 2 inches in size each in a 5-gallon tank, even with islands.
The fact is, smaller spaces breed more aggression In animals so, keep them according to their sizes and also keep more females than males because the males are the most aggressive.