The scientific name of the true creature featured in "Creature from the Black Lagoon" is Eucritta melanolimnetes.
Eucritta melanolimnetes ("the true creature from the black lagoon") is an extinct stem-tetrapod of the extinct genus Eucritta from the Visan epoch in the Carboniferous period of Scotland. 
Creature from the Black Lagoon is a 1954 American black-and-white 3D monster horror film from Universal-International, produced by William Alland, directed by Jack Arnold, that stars Richard Carlson, Julia Adams, Richard Denning, Antonio Moreno, and Whit Bissell. 
