Re: Halgerda dichromis

Dear Valda,
It wasn't this colour form I thought was possibly different but the one on the bottom left of your message with the more yellow lines and more sharply angled complete ridges. But perhaps all three in that message are different. Now that you are aware that such differences could be significant you will develop an instinct for noticing them. Internal anatomy is the best way to be sure if two animals are different, but we can't cut up every animal we see. Keep an eye out for egg laying, mating, - any little biological activity which might be a useful clue to differences.

Concerning the shrimps crawling over its back - you certainly seem to be in an area rich in crustacea. It looks like they have just hopped on as the slug has crawled through their territory rather than being commensals.

Best wishes,
Bill Rudman.