* Algae
* Detritus (decaying plant and animal matter)
* Small invertebrates like worms and snails
* Occasionally, they might eat the eggs or larvae of other crabs.
While it's not common for fiddler crabs to eat baby crabs, it's possible they might scavenge on a small, dead or injured crab. They are opportunistic feeders and will take advantage of available food sources.
However, it's important to note:
* Fiddler crabs are not predators. They are primarily scavengers and filter feeders.
* Their main diet consists of plants and small invertebrates.
* They are not known to actively hunt and kill baby crabs.
So, while it's theoretically possible, it's not typical for fiddler crabs to eat baby crabs. They're more likely to munch on algae and detritus!