Of course, Gandalf wasn’t in Middle Earth the entire time, but he did spend right around at least 2,000 years wandering around after he was sent to Middle Earth. Nevertheless, he still didn’t know ...

Gandalf was telling Frodo about his sojourn in the underbelly of Middle-earth when he raised nameless things, claiming that "Even Sauron knows them not.They are older than he.

Middle-earth’s great eagles are back in The Lord of the Rings: ... Arondir says nameless things lurk in the land, but does name this The Rings of Power creature, lunch. Sea Monster.