Also, I believe all Monstrose on the market are clones. How they mutated, I don't know if it was a genetic mutation or was aided by some sort of chemical or what not, but it's truly amazing seeing a standard bridge and a monstrose side by side, knowing they are mostly the same.
The Monstrose (according to some is better in some ways

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however it does grow slower and puts on much less mass with less speed.