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Cancridae / Paguridae (family level)
Beneficial marine cleanup crew. Hermit crabs offer entertainment through shell-trading behavior; crabs display nocturnal activity. Beginner to intermediate species useful for ecosystem balance in mixed displays.
Crabs and hermit crabs kept in marine aquariums are invertebrates valued as part of the clean-up crew, tidying the substrate and live rock. Hermit crabs process leftover food and algae and offer the added interest of swapping shells as they grow, so providing several empty shells is recommended. Many crabs become active at night and are omnivores that eat detritus and algae, though some species may bother small fish or corals, so temperament should be checked before adding them to a reef tank. They are relatively hardy and suitable for beginner-to-intermediate keepers, but are sensitive to copper-based medications and require stable water quality.
Source: Wikipedia (CC BY-SA 4.0)
Origin
Temperate to tropical coastal and reef waters worldwide
Temperature
24〜27℃
Edited & verified by: br-choku editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Primary sources
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The ideal temperature for Crab / Hermit Crab is 24〜27℃. Avoid sudden temperature changes and maintain a stable environment.
The price of Crab / Hermit Crab varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: June 23, 2026