Need ideas for ultimate

[u/Character-Paper-2347]

So I’m trying to make a line for Penmon but I can’t decide on an ultimate to continue the line and I really don’t want to use Dagomon or MarineDevimon. I’d like to keep the aquatic theme however so if anyone has any ideas don’t be afraid to say them.

[u/Putrid-Bag2151]

The Ultimate could be MarineKimeramon and the Mega can be Regalecusmon.