Beauty in Unexpected Places: Mother Nature's Sea Slugs

                Beauty is where you find it, isn’t it? In this day and age we’re taught that beauty comes in bottles and tubes and in the form of ornate and expensive status symbols. Mother Nature would beg – no, she would insist upon – disagreeing. Sometimes great and astounding beauty can be found in the most surprising places, harbored by the last creatures that you could ever suspect.

                 Consider the simple sea slug.

                 I have a relative who has a deeply embedded – and very vocal – aversion to these little guys. Once, many summers ago, when she came across a couple of them napping on a seaside log, she leaped sky-high and let out such a shriek that we all still chuckle at the memory. But little did my relative realize that those rather shapeless, featureless, squirming little brown blobs are only one of a catalog of different kinds of slugs gracing our sea beds, and that some of them add considerable visual pleasure to their watery homes.

                 Here are a few:

 1.       It’s kind of hard to believe Nembrotha cristata even is a sea slug. This is a very black little animal with almost phosphorescent green spots all over his body. He has an appendage on his back which almost resembles little wings, though I’m sure he doesn’t get much flight time in. He gets to be as much as 50mm in length and lights up its home in the Indo-West Pacific Ocean.  These are the waters near Indonesia.

 
 2.       How about a deep purple one with yellow appendages? This is the Hypselodoris apolegma.  It’s the color of a beautiful lilac and just lovely to look at, yet it’s a sea slug! Who ever knew they could be this beautiful?

 
3.       This one looks like something right out of a kid’s fantasy video game. It’s the Glaucus atlanticus . This bright blue slug with it’s pointy cerata (extensions that look like fingers up and down its “arms” and “legs”), looks like some kind of we monster, and it’s no wonder one of its nicknames is “Blue Dragon”. It truly looks like one! More that that, he’s a bit ferocious! He spends most of his life floating rather unambitiously on the waves, going wherever the tide takes him, but when he washes up on shore, he’s said to be capable of delivering quite a sting to anyone who tries to pick him up. Oh, and one of his select dinner menu items? The venomous man-o-war jellyfish!

 
4.       This sea slug actually looks more like some sort of sea anemone than a slug. The scientists call it Elysia crispata, but lots of people call it a lettuce slug. And it kind of looks like a nice bushel of Romaine lettuce. This resident of the Carribean seas may look very peaceful, but he may have a reason. He’s got security. Although scientists are still learning what his food source is, he’s known to eat plenty of algae. Num! But even when food is scarce and hard to find, those little “lettuce leaves” that make up most of his body continue to give off energy bursts that serve as food. He’s been know to live off those boosts for more than a month.

 
5.       The chromodoris willani is the one that looks the most like a traditional sea slug as most of us think of them. Well, he looks like a slug in shape, anyway. In colour, anything but! All have jet black stripes stretching the lengths of their bodies. The rest of their bodies are startlingly brightly colored. They can be anywhere from dark sky-blue, to translucent white. Wow! A glowing slug!

         Well, it just goes to show that Mother Nature is always hiding another of her beautiful surprises somewhere. Sometimes she tucks it away in some of the most surprising places. But you can find it, if you’re willing to look.

         Thinking back to that long ago moment on the shore when my relative let out that shriek, I wonder what she would have done if that slug had looked a shockingly pretty as these ones. Would she have shrieked and run? Or would she have leaned in for a closer look?

 File:Nembrotha cristata 2.jpg
chromodoris willani
Photo by Steve Childs from Lancaster, UK

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