They are charged with gas which allows them to float and move with great freedom out of the water, the more threatened they feel, the more they inflate, hardening their skin, in their adult stage they are capable of immolating themselves if they see that they are about to die at the hands of another creature causing a huge explosion.
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More than a year ago, I started working on this project in Tangelogames called "Monstertales Battle Lands"
You can follow me on Instagram too and see other kind of stuff https://www.instagram.com/yizard/
I Hope you enjoy and....