Pom Pom Crab
Ptychognathus barbatus
Also known as: Freshwater Pom Pom Crab, Tufty Crab
A tiny, fully aquatic freshwater crab with a surprisingly bold and active personality.
About
The pom pom crab (Ptychognathus barbatus) is one of those small freshwater invertebrates that tends to surprise people with how much character it packs into a very compact body. Adults typically top out around an inch, making them well suited to smaller, well-planted setups. Unlike many freshwater crabs that spend time wandering out of the water or hiding for weeks after a molt, this species is fully aquatic and stays noticeably active in the open, which makes it genuinely fun to watch. They're curious little animals that explore their environment with a purpose, picking at surfaces and investigating every corner of the tank. Feeding is straightforward. They accept a wide range of sinking foods and aren't particularly fussy. One thing worth keeping in mind is that small dwarf shrimp, especially juveniles, may be at some risk, so pairing them with adult-sized shrimp is a safer approach if you want a mixed invert tank. A secure lid is important since, like most crabs, they'll test boundaries and can find their way out of an uncovered aquarium. Pom pom crabs are a solid choice for beginners looking to add something a little different to a community setup without taking on a demanding invertebrate.
Good tank mates
Species that tend to coexist peacefully with Pom Pom Crab
Frequently asked questions
- What water parameters does the Pom Pom Crab need?
- The Pom Pom Crab does best with a pH of 6.2–7.2.
- Is the Pom Pom Crab aggressive?
- The Pom Pom Crab is generally peaceful and suits a community tank with similarly calm tankmates.
- What does the Pom Pom Crab eat?
- The Pom Pom Crab is an omnivore. It does well on a varied diet of quality flake or pellet plus occasional frozen or live foods.