Tag Archives: Tricolia picta

Shells

Posted on by under molluscs, photography, shells

Another short post with some pics I took earlier in the year at the kitchen table. I was an avid shell collector when I was young and, since I am at the beach or underwater a lot, I still pick up and take home shells (never live molluscs). I found that it is actually quite hard to take decent macro shots of shells. Ideally you take photos at an angle while the shells are underwater on a black background, but I had trouble with glare and gave up on that approach. The photos here were all taken above-water on a white background (which will be overexposed with the shells being underexposed so that is something I need to figure out). Shells tend to lose their lustre so I have used baby oil to restore their gleam. Above the Pheasant Shell Tricolia picta (previously UK specimens were considered to be T. pullus), a favourite macro topic of mine as well when alive, see here. I have pasted a few more photos below, including the five species of Topshells common in Cornwall, but I am too lazy to add all species names! (feel free to comment if you are curious about a specific species and I will do my best to answer). Something to experiment more with in winter when I cannot go out.

Pheasant Shells

Posted on by under Macro, molluscs, rock pooling, shells, snorkeling

The Pheasant Shell is one of my favourite little critters in the rockpools in Falmouth. It is a bit weird to refer to these organisms as ‘shells’ actually, as they are living things and the nonliving shell is ofcourse only a part of them. The confusion extends to its scientific name: this species was previously known as Tricolia pullus, but has recently been split into a Southern European T. pullus species and a Northern European T. picta species. Perhaps the dust needs to still settle on that one.

I have taken these photos, on different occasions, with the mzuiko 60mm macrolens and the nauticam cmc-1 wetlens. The extra magnification the latter lens (screwed onto the housing) offers is great; although somehow I always want to get even CLOSER! I have not nailed the Pheasant Shell shot either. Reflecting on these pics I think I need to use a shallower depth of field to get rid of cluttered backgrounds. Next time.

The calcified operculum (the little door to close the shell) is clearly visible in the first photo above, as are the tentacles. On the second photo above you can even see that the left ‘neck lobe’ is more deeply digitated (fingerlike) than the right one. For more detailed (studio)shots of this and other molluscs please see Morddyn’s flickr account. I will post more macroshots of other mollusc species soon!