Complex sentence: Ultimately Black Manta decided to destroy Starro Simply because he couldn't get it but a small piece was found and sent to the surface to be studied since the Atlantean science lab is in no condition to study it.
Split into simpler sentences: Ultimately Black Manta decided to destroy Starro simply because he couldn't get it. But a small piece was found and sent to the surface to be studied since the Atlantean science lab is in no condition to study it.