The choices of the Coralax are a mystery.
How to Get
The Coralax Blue Hybrid Gladiator Badge is obtained by defeating 100 of any type of Coralax.
This badge was a Villain only badge prior to Issue 12, but is now available to heroes also. For heroes, Coralax may be found in The Hollows, under the water in the Red River neighbourhood. Like the Magmite Lords, they will only appear if you are within attackable range for them, or they are hit with an Area of Effect power.