A barrel-shaped nurserySourced
Phronima turns another animal into a moving home for its young
Female Phronima amphipods hollow out gelatinous salps and lay eggs inside the remaining barrel. They propel it through the water while their young develop. This differs from continually feeding on a living host.
The travelling nursery begins as another animal.
Summary / translation: Unbubly · CC BY-SA 4.0
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Phronima · Wikimedia contributors
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Reviewed: 2026-10-10