New volume and characters?

I've read this and I really like it ^^ but there's something I'm not sure about: I saw some image of new characters like a shark (Agari) and a starfish (Goromaru). I've found some image and I guess they're real new characters but I can't find the volume where they're from. Is it already translated in English or we have to wait? Can I find it somewhere? Someone knows it? (Sorry for my bad English, I'm Italian, I tried ^^').