Blue Dragon
In the ocean lives a dragon
Who is luminously blue
And although she looks quite harmless
You will find it isn’t true
This Blue Dragon is a sea slug
Calmly floating on her back
While a Man-of-War approaches
And commences its attack
Now it’s jelly versus dragon
Who lacks flames and cannot roast
But the sea slug wins the battle
And that jellyfish… is toast
And she swallows down the jelly
Gobbles up each stinging cell
Then she redistributes poison
In a way that suits her well
At the end of each frilled finger
Little Dragon packs a punch
As she uses jelly poison
To subdue her next sea lunch
The Blue Dragon, or Blue Glaucus, is a sea slug that can grow up to about 3 centimeters long. It spends its life floating along just under the surface of the water, upside down. It carries an air bubble inside that allows it to stay near the surface of the water. The Dragon’s blue underside cannot be seen well from above, protecting it from hungry, fishing birds. Its topside is silvery gray, which cannot be seen well from under the water and this protects it from hungry fish.
Some sea critters do manage to find this feisty delicacy and do try to eat it. They must get past its poison, however, for it protects itself well. When a blue dragon manages to beat and eat a Portuguese Man-of-War, it has the unique ability to swallow the stinging cells, or nematocysts, without harming itself. On the contrary, it uses these stinging cells to defend itself in the wild blue yonder.
For more information see the following websites:
http://www.seaslugforum.net/find/glauatla
http://www.realmonstrosities.com/2011/07/blue-sea-slug.html