When incompatible Hydractinia symbiolongicarpus colonies identify each other as non-self via Alr genes, they fight. As a result, the colony on the left has started to grow over the colony on the right. (IMAGE)

University of Pittsburgh

When incompatible Hydractinia symbiolongicarpus colonies identify each other as non-self via Alr genes, they fight. As a result, the colony on the left has started to grow over the colony on the right.

Caption

When incompatible Hydractinia symbiolongicarpus colonies identify each other as non-self via Alr genes, they fight. As a result, the colony on the left has started to grow over the colony on the right.

Credit

Huene, A. L. et al., PNAS, 2022

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