Though I have a Hydrus Celinox, I cannot seem to get the 'Merana Accomplis' achievement. Any idea how to activate it? (Other than making another pet Hydrus, as I have no such plans right now.)

not sure how this is relevant to games, but i just morphed my hydrus montre into another colour via elixir, then re-did a quest

I think you can only get the achievement if you make a hydrus pet now.

As in, pets turned hydrus before the achievements don't count.

Oh, I wondered the answer to that as well. thankyou

That makes a lot of sense, I just thought the game wanted to be mean to me.