There are lobsters in trees

 Also on a pencil.

https://www.reddit.com/r/sandiego/comments/45w842/san_diego_zoo_hatches_nearextinct_tree_lobster/

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http://thinkmaine.bangordailynews.com/2016/02/14/science/tree-lobsters-believed-for-decades-to-be-extinct-are-being-resurrected/