…but this time not a cetus! In this instance Juvencus instead uses belua. This one occurs in a speech of Christ to the Pharisees and Sadducees (3.224-35). Here are the relevant lines (3.233-5):
“…Sed vobis signa dabuntur,
quae maris immenso quondam venere profundo,
belua cum tenuit ventris sub carcere vatem.”