That transparent shell next to our mantis shrimp is not a ghost, but his molt! 👻 But what's cooler than that? The urchin next to it is feeding on it! While urchins primarily eat algae, they are opportunistic feeders and will consume small animals or organic material when available. This can include sea cucumbers, mussels, sponges, and occasionally the molts of other animals. Molts like this one are packed with nutrients, making them a tasty (and sustainable!) treat for these prickly sea creatur

Armed with the most sophisticated vision and fastest strike of any predator on Earth, the mantis shrimp is an unsuspecting threat. | National Geographic