Nudis like to show off their colours by daylight

Brightly-colored nudibranchs and sea slugs are most active during the day, making their colors highly visible. This phenomenon, known as aposematic signaling, acts as a warning to predators about their potential toxicity. The study showed that species active in daylight had brighter colors compared to those that are nocturnal. The visual signals are crucial for their survival, as many predators rely on sight during the day. Understanding this relationship can help scientists learn more about marine species and their defenses.