“…and a relatively lesser-known group of parasites, the Monogenea,
which are mainly worms that externally attach themselves to fish through a curious
structure that can be likened to a combination of suckers and hooks. These
structures have a rather curious, “science fiction-y” name: haptors (Figure 6.1).”
-The First Brain, page 96.
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https://www.goodreads.com/book/show/20380853-the-first-brain