Ok; I thought I read it somewhere about poisoning other fish. I knew about the human impact.
Ignore what I said then
If your newt has bumps I'd guess that is is male. As boboboy said he should be old enough to tell now.
Boboboy in your opinion is this newt male? <a href="http/www.flickr.com/photos/dipsydoodlenoodle/3945459808/" target="_blank">http/www.flickr.com/photos/dipsydoodlenoodle/3945459808/</a> It has lumps at the base of the tail but the tail isn't shaped like a males is (it's not a very good photo of the tail... <a href="http/www.flickr.com/photos/dipsydoodlenoodle/3944681173/)" target="_blank">http/www.flickr.com/photos/dipsydoodlenoodle/3944681173/)</a>
need to see, around breeding time. Male, i think.
sorry I just noticed your reply. I also "think" male but I'm not too sure. I will check back come breeding season. Like I said I'm not fussed I'd just like to associate it with a gender so I don't feel guilty calling it a him or a her when it's not. (I do however call both of my female budgies boys )
it worried me too. not just for other fish. i could not afford anything in the house, that's too dangerous. because my daughter is disabled, and gets into anything. (she is the reason i have any tanks). I've seen it a number of times myself.