Microbial respiration in the asteroid diffusive boundary layer influenced sea star wasting disease during the 2013-2014 northeast Pacific Ocean mass mortality event

Sea star wasting disease (SSWD) describes a suite of abnormal signs in affected Asteroidea (Echinodermata). The gained prominence 2013-2014 after it was linked to mass mortality the northeast Pacific Ocean. Recent work highlighted key role heterotrophic microorganisms inhabiting diffusive boundary layer around sea stars generating via oxygen depletion. However, is unclear whether this phenomenon occurred during or how surviving populations may have adapted low conditions. In opinion piece, I outline evidence for both oceanographic conditions experienced by asteroids and from population genetic studies asteroids.