I am a researcher and a teacher in ecology with a PhD in fish ecology. I also work on a tv-show answering viewer questions on animals. Apart from that, I do a lot of photography both below and above the surface. I live in Umea, Sweden. Given the location of Umea just south of the polar circle, I try to spend as much time as possible out of Umea in the winter time.

Monster Nemo

I ended a blog some time ago with “I will in my next blog entry shortly discuss the relationship within an anemone fish “colony”. Be prepared for a grizzly world, combining forced starvation, castration due to stress, a willingness to let conspecific meet a certain death outside the anemone and cannibalism in one and the…

A crab up your butt!

All divers interested in critters sooner or later will get interested in crustaceans. Some of the crustaceans are considered “must see” items, such as harlequin shrimp, tiger shrimp, several of the extremely small shrimp recently found here in Lembeh, emperor shrimp and a host of other shrimp. The keyword here is shrimp.  Crabs on the…

Sex: when bigger is better!

Simon actually did some serious thinking the other day after my blog on the rarity of sexually selected characters in marine systems. He came up with a couple more examples of sexual selection, one of which was the difference between the sexes in mandarin fish. Mandarin fish males are much larger than females and have…