An extinct marine reptile from the Cretaceous period that lived in shallow seas and had a long body adapted for swimming.
From Greek 'aigialos' meaning 'shore' and 'sauros' meaning 'lizard', combining terms to describe a shore-dwelling reptile fossil discovered in the 19th century.
This creature's name literally means 'shore lizard,' and paleontologists named it this way because its fossils were found in rocks that formed in ancient shallow coastlines—it's like reading the ocean's diary from 100 million years ago!
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