Persian Carpet Flatworm crawls gracefully across a sandy bottom while its body moves and flows in the current

persian carpet flatworm flatworm sea slug nudibranch pseudobiceros marine life reef pseudocerotidae slug scuba worm coral biodiversity underwater slithering scuba diving sea bottom diver wildlife crawling ocean animal dive exotic slime pattern closeup south east asia marine carpet following odd bizarre nature sandy beautiful sliding moving away background persian natural tropical flat water travelling colorful elegant