Creature designs and presentation

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I'm making these critters to mimic professional creature design sheets. They are originally based on the Crimson Revolver: The Racnor challenge, so they're designed to be able to fight off or prey on armored warriors. And that's about all the design guideline I used. For each creature I have life cycle and habitat in mind when designing. I'm looking more for things I should watch out to improve on or avoid doing for next creature project, as well as what could be changed on these right now. Any feed back will be appreciated!