Fantasy Creature Design of an Underwater Photosynthetic Whale

Imagined non-existing mythological reimagined blending reptilian and arthropod traits, medium human-sized, depicted in concept art style in a ice planet habitat. Anatomically believable design — coat, scales or skin texture coherent, eyes and limbs in plausible proportions. Single creature, calm posture, environment provides natural lighting and scale reference. No humans. No animal cruelty, injury, blood or gore. No monster-of-the-week horror — this is a wildlife-style render of a believable invented species. Specifically: underwater photosynthetic whale. Target search intent (rendered visually, no on-image text): "fantasy creature design" (en).