The Intruder Within

The Intruder Within (1981) is a horror, science fiction, tv movie directed by Peter Carter rated 5.8/10.

When drillers on an offshore oil rig dredge up several prehistoric eggs, one man is attacked by what appears to be an unidentified deep-sea creature protecting them. Soon, strange symptoms and behaviors become apparent among the crew and one of the creatures grows to adult-size.