Mosasaurus and Scorpius Rex hybrid.
Mosasaurus with Scorpius Rex quills on tail, back and tip of the fins. Mentally unstable aquatic reptile. Hypnotize by fire. Max level black stripes with main mosasaurus blue scale body. Max level quills are extended longer. Max level yellow line on both sides of the face. You Ludia is quite imaginative so I hope you can figure out the rest of the aquatic dinosaur ludia.