Puffer Fish are too easily countered. With an attack of only 2, they become useless vs many upgraded shields. Not only that, but they cost 5
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. With the boost that Abyssal Crawlers received, in almost every situation I would rather take the Crawlers. I do however like splashing gravity in and adding momentum with Puffer Fish. However, this is supposed to be mono, so that is not really an option.