Thanks firenzenz, I'll send him a PM and try to give it a go. I found the stuff on Shanes world which was pretty good, but I'm a bit scared to pick them up and hold them in case I hurt them. I guess it must be ok though, because I've seen lots of people doing it. Anything I should keep in mind when ...

That's a good idea - a sticky with general sexing for each type of catfish in each catagory with pics.

I have found this post
http://www.planetcatfish.com/forum/viewtopic.php?f=5&t=7401&p=43633&hilit=sexing+l270#p43633

But the post it leads to about sexing the L270 I can't get to.

Does anyone know a reliable way of sexing the L270? I have a pair that are about 60mm long, and I'd like to know ...