![]() Once the Grimora toxin effects the dragon's behavior and nervous system, the pupils constrict, sometimes unequally ( Anisocoria). The very first symptom, however, is increased itching and scratching around the head and neck, presumably from the presence of feasting parasites. This toxin takes a while - at least several hours to half a day or so - to start effecting a dragon. Once attached, according to Fishlegs, the Grimora produce a toxin that increases wildness in dragons. It is also possible Grimora release a numbing agent to prevent dragons from being aware they are being bit, like a tick. They seem to prefer to attach themselves around the head, neck and shoulders, of dragons. It is also not mentioned if they prey on other animals, or just dragons. Grimora presumably feed of a dragon's blood, though it is not specifically stated in the episode, "A Grim Retreat". When salt or a strong salt solution is applied to slugs, these invertebrates will have the water drawn out of their bodies by osmosis, dehydrating the creature. ![]() It is unknown why the creatures dislike salt, and subsequently saltwater, but their aversion brings to mind slugs. Salt appears to be the Grimora's weakness, though as seen in "A Grim Retreat", it does not kill them outright. Somehow Grimora is able to migrate to the area and inhabit these temporary pools. ![]() A collection of vernal pools appear on Hobblegrunt Island. Lucky for us, they are quite rare and only live in freshwater biomes such as ponds, lakes, streams, rivers, and wetlands! Īpparently, also mentioned in the School of Dragons, Grimora can live in vernal pools - temporary pools of water. Lamprey is otherwise very edible, and is said to be very "meaty". One other similarity between lampreys and Grimora is that some lampreys have toxic mucus and serum and must be thoroughly cleaned and cooked before eating. There are some species of lamprey, however, that live in the ocean as adults. This parallels the Grimora in that they prefer freshwater. After metamorphosing into their adult form, they may migrate to the sea or into lakes. Lamprey also spawns and spend their larval stage in freshwater. To note: only some species of lamprey are parasitic, while others do not feed at all in their adult stage. They attach to the flesh of their prey and bore into their body until they reach blood or other body fluids to feast on. Lampreys are well-known for their parasitism of fish and have round mouths full of teeth. That said, they do not have vertebrae, but instead, have another structure just above the notochord called the "arcualia". Lampreys are jawless, eel-like creatures with an internal skeleton of cartilage. Overall though, the Grimora's general appearance, mouth, in particular, is reminiscent of lamprey fish. Eight legs are a feature seen in Class Arachnida, which incidentally includes many parasites such as ticks and a variety of mite species. The School of Dragons iteration of Grimora shows small spiky leg-like limbs - four on each side. However, the appearance of their wings, suggests at least some sort of internal structural component. The Grimora are described as leeches, which are invertebrates. It has a round, sucking, radial mouth filled with rows of teeth around the interior, similar to that of a Whispering Death. It has dragon-like wings and a gray head section that appears to have gill slits. It has a short tubular red body with a blunt tail. Grimora is a parasitic creature that appears about the size of a tiny mouse. Once they latch on, they crawl under a dragon's scales and inject a toxin that drives a good dragon mad, They're relentless, and we only know one of their weaknesses: salt. The Grimora are worm-like parasites with tiny wings and sharp teeth that latch onto passing dragons.
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