So here's my Fakemon baby. I have no idea what the first two evolutions names are, but the big boy at the bottom there is called a Warca.
The baby stage there is just a water type, but after that they're a water/dark
I call them the Gyarados hunters because its mainly what they specialize in, considering that Gyarados are so common. But they won't pass up easy meals like Magicarp or Seel. Warca males top out at about 30 feet long, females tend to be a bit smaller. The second evolutions fins are more for defense then anything else. A bigger predetor will see the large fin and assume its either a larger adult, or sharpedo.
I based this guys off of killer whales, obviously. He's been swimming around in my brain for ages, but finally managed to make him look decent