Nudibranchs eat using a radula, which is “kind of like a sharp, hard tongue,” says Goodheart. Watching a nudibranch eat isn’t, at first glance, all that different from watching a slug on a leaf.

This method of protection can keep almost all predators at bay - but not the kaleidoscopically colourful sea slug. Nudibranchs, commonly known as sea slugs, are a group of shell-less marine molluscs.

To cross-stitch your nudibranch, you need to make a small cross of embroidery thread to match every coloured square on the pattern. Choose a square roughly in the middle of the nudibranch pattern and ...

It seemed like a lot of effort for a tiny reward. Then I encountered my first nudibranch, a type of vibrant sea slug. I was ...

You’ve probably walked right by these nudibranchs without realizing it. They blend in almost perfectly with the seaweed, appearing as tiny, yellowish blobs on the sand. But look closer ...