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Arabian Yellow Band Disease (AYBD)

Aybd_on_porites

Arabian Yellow Band Disease Porites spp. Photo: Andrew Bruckner

Porites_aybd

Arabian Yellow Band Disease
Porites harrisoni
Photo: Bernhard Riegl

Aybd_echinopora

Arabian Yellow Band Disease
Porites harrisoni
Photo: Bernhard Riegl

Acropora_downingi_aybd

Arabian Yellow Band Disease
Porites harrisoni
Photo: Bernhard Riegl

Aybd_cropped

Arabian Yellow Band Disease – Acropora spp. (single branch).
Notes: The yellow band is adjacent to previously denuded, algal colonised skeleton and recently dead, exposed skeleton.
Photo: Andrew Bruckner


Arabian Yellow Band Disease identification

AYB manifests as a bright yellow band of one to several cm in diameter at the interface of healthy and dead coral.

The band migrates across the coral in a linear to annular pattern, producing a margin of decaying tissue adjacent to healthy tissue. As the band progresses, dead skeleton may retain a yellow pigmentation, or it becomes greenly discolored in the genus Porites or, in Acropora, is usually pure white.

The yellow band is raised above the surrounding tissue and appears often to have a thin mucous envelope. Unlike BBD, no filaments or microbial band are visible.


Arabian Yellow Band Disease and monitoring effort over time

Global occurrence of AYBD

0sightings