A genus of small marine crustaceans (amphipods) that live in water, characterized by their double-ended body structure.
From Greek 'amphi-' (both) and 'thura' (door or opening), referring to the organism's bilateral symmetry and openings on both ends of its body.
These tiny creatures are invisible heroes of ocean ecosystems—they're decomposers that break down dead organic matter on the seafloor, cycling nutrients back into the ocean food web.
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