Go to Osere and talk to the scientist.

Oh, hello, I'm Karolina Bakker, how can I help you?

Hi, have you seen 'Crazy Crowley'?

I beg your pardon?! Marlon happens to be a friend of mine! I know he's perhaps a little eccentric, but that's no reason to call him names.

Oh, sorry. It's just that I never know what to call him...

So, what do you want?

I just want to know where I could find him

Well... perhaps we can help each other. I'm currently studying Kerberos biology, and I need to dissect another batch. Could you hunt some Kerberos for me?

Sure thing

Objective

Hunt 20 nearby Kerberos

Dialogue after killing 20 Kerberos

Fantastic, thank you!

Marlon went to discuss his theory with Kaj Petrov, and oceanographer working on the coast near Fort Troy. Although he's probably at Fort Troy now.

What theory? What is Marlon actually doing?

He was very cryptic. All I can tell you is that he asked me some hypothetical questions regarding my megafauna research.

Good luck! Hope you find him.

Ok, bye