Jellyfish (Books)

Jellyfish are mentioned in the first book, How to Train Your Dragon.

Description
Jellyfish belong to the Phylum Cnidaria and Class Scyphozoa, or 'true jellies'. Occasionally species in other Cnidarian Classes may also be referred to as jellyfish.

Jellyfish, so called because of their jelly textured invertebrate bodies, are almost exclusively marine animals. They are simply structured, typically consisting of a bell-shaped body with tentacles, and one orifice through which to eat and expel waste.

Some species found in the oceans around Scandinavia include the moon jellyfish (Aurelia aurita), the lion's mane jellyfish (Cyanea capillata), and the [https://en.wikipedia.org/wiki/Blue_jellyfish blue jellyfish (Cyanea lamarckii).

Function
In the How to Train Your Dragon Book Series, jellyfish are mentioned as descriptors and in exclamations.

In reality, jellyfish are occasionally eaten. They are also potentially dangerous to humans due to their stings and can occasionally disrupt fishing.

How to Train Your Dragon
The character Fishlegs No-Name is described as having "a squint that made him as blind as a jellyfish and an allergy to reptiles."

Fishlegs also uses jellyfish in an expressive exclamation.

"Well, jigger my jellyfish"

- Fishlegs