underwater cave, ARK: Survival Evolved, game environment, submerged, crystal formations, bioluminescent plants, aquatic creatures, stalactites, stalagmites, rocky textures, moss-covered stones, exploration, scuba gear, air bubbles, treasure chests, hidden passages, ambient lighting, blue-green water, mysterious atmosphere, wide-angle lens, 3/4 view, detailed environment, survival challenge, natural arches, schools of fish, underwater flora, serene, depth of field, high-resolution textures.