Underwater view with many translucent jellyfish on the left and dense green marine growth on the right, featuring magnified insets of microscopic organisms.

A realistic environmental awareness poster illustrating the mass occurrence of harmful marine organisms caused by climate change. Depict Moon jellyfish (Aurelia aurita) and Nomura’s jellyfish (Nemopilema nomurai) AND harmful red tide organisms (toxic phytoplankton) with equal visual importance and balanced presence. The composition must clearly show both jellyfish and harmful algae as major subjects, each occupying approximately half of the visual focus. Jellyfish appear in realistic scale and natural proportions in Korean coastal waters. Harmful red tide organisms are shown clearly and prominently through water mass discoloration, dense phytoplankton concentration, and multiple magnified scientific inset views. Neither subject should dominate the image. Overall tone is serious, calm, and appropriate for official public institutions. Cool color palette only: deep blue, teal, gray, muted green. No red tones. Realistic underwater lighting, documentary photography style, scientific and educational illustration. No text, no typography, no letters, no logos, no captions in the image. Concept similar to an official government environmental campaign poster. No science fiction, no fantasy, no alien, no monsters, no glowing or dramatic effects. See more