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New Sea Anemone Boosts Hermit Crab's Size and Habitat

11/5/2025

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Summary

Story summary

Kumamoto University researchers describe a sea anemone, Paracalliactis tsukisome, living in symbiosis with the hermit crab Oncopagurus monstrosus off Japan's Pacific coast.
The anemone secretes a shell-like carcinoecium that expands the crab's living space.
The organism feeds on organic particles and the crab's feces, enabling efficient recycling.
The study documents a mutualistic relationship, with the crab achieving a larger body size, as published in Royal Society Open Science.

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Story summary

Kumamoto University researchers describe a sea anemone, Paracalliactis tsukisome, living in symbiosis with the hermit crab Oncopagurus monstrosus off Japan's Pacific coast.
The anemone secretes a shell-like carcinoecium that expands the crab's living space.
The organism feeds on organic particles and the crab's feces, enabling efficient recycling.
The study documents a mutualistic relationship, with the crab achieving a larger body size, as published in Royal Society Open Science.