new camera: Canon Powershot D30

As I drowned my Panasonic Lumix (some pics here) and as my Canon Powershot in an underwater housing (some pics here) is quite cumbersome (forgetting the option of taking my iPhone underwater), I decided to buy a new point-and-shoot underwater camera. All major brands have a rugged (shock-, dust- and water-proof) option and needless to say each has their pro’s and cons. I decided for the Canon Powershot D30 because I know and like the brand and because it goes deepest (24 meters) which would mean I could take in on any future dives. I later read (tip: don’t read more reviews after you have ordered) that the aperture is relatively small (bad for low light (UK underwater) environments) and that it had not been updated significantly from the previous version…so it is not all great. In general, point-and-shoot camera’s won’t give you super great images (although sometimes you strike lucky). However, there is a VERY large price gap between these camera’s and SLRs in housings (with lights). Check here for a nice Beginner’s Guide to Underwater Photography.IMG_3295I tried out the camera just for a little bit as I did not have much time. I went rock pooling which meant I could not look through the viewfinder for any underwater pics. The pools at the moment are dominated by brownish fuzzy algae which do not look great and it was overcast, so conditions were not ideal. Here a snap of Morchellium argum, a colonial tunicate that is common at the moment:IMG_0006Two pics for comparison with the iPhone of a Dog whelk Nucella lapillus laying eggs. I will probably still stick with the iPhone for above-water pictures as I prefer tapping the screen to focus as well as having the olloclip macro option. Also, the colours seem more vivid, although to be fair I need some more time to play around with the Canon. iPhone first, Canon second:IMG_3267IMG_0022

tunicate time

After being abroad a couple of times this summer (Slovenia, France 1 2 3 and The Netherlands), I have started rock pooling in Falmouth and Flushing again. Things have noticeably changed since the spring, most prominent being the recent abundance of all kinds of sea squirts (tunicates). They are everywhere, and some of them I have not seen before. The solitary sea squirt Corella eumyota is very common, with smaller individuals a translucent white and larger individuals more orange:


My personal favourites the colonial Botryllus (in the above picture bottom left among the bryozoans) and Botrylloides are also very abundant at the moment. I should measure the width of a population on a recognizable, large rock and go back to check how fast they grow actually. Below a picture of both species growing side by side:


Some more Botryllus schlosseri pictures demonstrating the variability in colour (the Botrylloides leachi here look all the same):



A species that I had not noticed before and is growing in every rock pool in Flushing at the moment is the orange Morchellium argum, which grows as a colony as does Botryllus or Botrylloides but in a rather different way. A colony consists of a stalked club with individual zooids protruding from the ‘head’: