Table 1.

Clinical observations based on a 1–5 grading scale in sea stars affected by Sea Star Wasting Syndrome, adapted from Bates et al. (19).

Score	Description
0	Clinically normal
1	Mild disease, no white lesions; often central disc flattening, lack of adherence to substrate, mild swelling of arms, and abnormal wrapping of arms at rest
2	Mild disease with small white lesions restricted to one arm or only the central disc
3	Moderate disease with white lesions on one arm plus the central disc OR two arms OR an arm/disc interface
4	Severe disease; white lesions on three or more arms OR two arms plus central disc OR arm/disc interface plus arm or central disc OR more than one arm/disc interface lesion
5	Severe disease; one or more arms detached from the central disc OR non-responsive, detached from substrate and lacking tube foot movement