The Leviathan seems to have agro like a Chomper. You can pretty much bump into them without getting attacked. The Calypsocod however are not going to make swimming tp's very easy.
Yep Calypsocod seem to have about the same agro as the RipperSnapper. Not sure where they are at yet (wel around PA) but it will be interesting to see what happens.
oh and one other thing, will the Leviathan be here for good, or are they just an 'event' mob like the Longtooth or Eomon??
Hope they are here to stay. They are in the pond just SE of PA. No idea if they are in other locations too.