1st, i won’t say amphibians because it is just incorrect, not sure why they don’t use amphibious instead.
Back on topic
This mission is gonna take a while unless i just level up a bunch of commons. At my current park state i’m not a huge fan of spending DNA on things that are not overly useful in the long run especially things that i will acquire over time just through typical game play. I have every amphibious creature from all the legendaries down through the commons at lvl 40 and 2 of a few. The only 2 i don’t have at lvl 40 are the rare hybrids. But even if i make a lvl 40 Nundagosaurus and then make 2 lvl 40 Diplotators so i have 1 in stock and one ready for S-hybrid, then also get another lvl 40 Postosuchus and another Kaprosuchus so i have 1 in stock and 1 ready for their hybrids that would still only be at 21 of 25
I’m all for story missions and them taking a while but IMO this one is just the game making you waste your DNA while i would much rather be using it for other things.
Ill probably just semi ignore the mission for now and see what kind of creatures i can collect from typical day to day play, maybe get lucky and get a few to finish up some i have sitting around at lvl 30. I even started doing more modded pvp in hopes of winning a few Diplotators but have had no luck.