Blurp

Blurps are small, poisonous creatures from Herdy Gerdy. They look like black porcupines.

How to Herd Blurps
Blurps cannot be herded, however they can be moved about in two methods. Playing the Magic Flute will make them slowly move away from Gerdy, however this is very slow. The faster alternative is to blow the Horn in their presence; this makes any Blurps nearby crawl up into a ball, which Gerdy can kick around. Blowing the horn again causes them to revert to normal.

Behaviour
Blurps will ignore all other creatures they come across. Gromps will eat them if given the chance, however this is their most useful function-when a Gromp eats a Blurp, it becomes sick for 20 seconds, and will not attack Gerdy or any other creatures until it recovers. Blurps can survive long falls. They respawn (often infinitely) from nearby holes in the walls.

Pens & Map Indication
Because Blurps cannot be herded, they do not have pens; as such they are also not represented on the map. However, when a Gromp eats a Blurp, their dot on the map turns the same shade of green as the Doops.