Reasoning recorded at review

• •Elongate shell-less sacoglossan body
• •Pair of long smooth longitudinally rolled rhinophores
• •Paired parapodia folded together over the dorsum rather than the separate sea-hare mantle and parapodial cavity
• •Pale green-white body with a fine green reticulate digestive pattern and low rounded papillae

Alternatives considered

• Elysia pusilla

  Why plausible: Can vary from green and white to nearly solid white and has a papillose, tightly closed parapodial form

  Comparison: A confirmed Halimeda host and sharper lateral/dorsal views of the parapodial margin are needed; the photographed body is less strongly Halimeda-segment-shaped than typical

• Elysia cf. tomentosa complex

  Why plausible: Members of this complex can have papillose parapodia and variable pale green-brown coloration

  Comparison: The complex contains multiple molecular lineages, and species-level placement needs host, fine papillation, reproductive/developmental or DNA evidence

• Elysia rufescens or another large reticulate Elysia

  Why plausible: Long rolled rhinophores and a reticulate pale-green body are compatible with several tropical Elysia

  Comparison: Size, host alga, full parapodial-edge colour and specimen evidence are unavailable