Megalograptus (Greek for "big writing") is a species of eurypterid, or sea scorpion, that lived during the Ordovician Period, from 460 to 445 million years ago. It had front limbs with spikes like a basket, which it used to dig up prey, usually trilobites, small orthocones, small, jawless fish, and even other eurypterids. It had very few predators, only being preyed upon by larger eurypterid species and the giant orthocone, Cameroceras.

In The Land Before Time

A group of Megalograptus appear in The Land Before Time IX: Journey to Big Water, where they briefly swim past Littlefoot when he is exploring Mo's Home.
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