Leeches are animals mentioned in the DreamWorks Dragons Franchise.
Leeches are invertebrates belonging to the phylum Annelida. They are segmented worms with two suckers, one at each end. Unlike other worms, their external segmentation does not correspond with the internal segmentation.
Most leeches live in freshwater environments, while others may live in terrestrial or even marine environments. The most known species of leech is the Medicinal Leech (Hirudo medicinali), which is commonly used in treatments for various diseases.
There is no mentioned function for leeches in the How to Train Your Dragon Universe.
In reality, the leeches are used for medicinal purposes, especially reattachment of body parts and reconstructive and plastic surgeries. Their saliva is also used as a coagulant.
|“||Ruffnut: I don't know, I haven't seen him this freaked out since he found a leech on his-
Astrid: Okay, I'm going to stop you there. [src]
|“||See ya later, ya leeches! [src]||”|
- Grimoras appear to be based off the leeches, in terms of appearance and feeding behavior.