A Chasm Leech is a huge worm that lives in the Deep Sea. [1a]
Once a large corpse is infested with leeches it can be animated by the group as they replace the muscle and sinew of the host.
A favourite body to be consumed and animated are the bodies of Sea Dragons as not only will it feed them for years but it can also be used to attack and kill other creatures for the next generation. [1a]
Their bodies are slug-like with mouthparts lined with rasping teeth that allow them to tear away rotting flesh. [1a]