Tag Archives: invertebrates

Tiny critters under rocks

Posted on by under anemones, bryozoans, chitons, cnidarians, crustaceans, echinoderms, fish, Macro, molluscs, mzuiko60mm, rock pooling, snorkeling

When the viz is bad, I take my macrolens (sometimes with the Nauticam CMC-1 wetlens for a bit of extra magnification) out to the pools. Sometimes I stick to the surface of rocks and seaweeds (to look for stalked jellyfish for instance), but other times I turn over rocks under water to see what hides beneath. Quite a lot! There are larger animals, such as Topknots and different types of crabs (and Worm pipefish as pictured here) but mainly they are quite small (around a centimetre or even less). See the selection below (Tricolia, Bittium and Limacia were not from under rocks but I had to make the grid fit!).

Mimachlamys varia
Janira maculosa
Hiatella rugosa
Tricolia pullus
Bittium reticulatum
Porcellana platycheles
Trivia monacha
Limacia clavigera
Nerophis lumbriciformis
Calliostoma zizyphinum
Candelabrum cocksii
Diodora graeca
Ophiotrix fragilis
Amphipholis squamata
Leptoplana tremellaris
Asterina gibbosa
Watersipora subtorquata
Mimachlamys varia
Lepidochitona cinerea
Callochiton septemvalvis
Tritia incrassata
Trivia monacha
Callochiton septemvalvis
Aulactinia verrucosa + Acantochitona crinitia + Lepidochitona cinerea

Buoy Biodiversity

Posted on by under bryozoans, buoys, crustaceans, fisheye, Flushing, invasive species, non-native species, Olympus OM-E-M1 Mark II, photography, seaweeds, snorkeling, sponges, tunicates, wide angle

A while ago I played around with taking pics of the underside of a buoy, which was fun, and so i wanted to practice this some more. My mistake the first time (see here) was to use a fast shutterspeed (the buoy was bobbing about after all) which made the water look unnaturally dark. I tried again this weekend and it went a bit better, although I already know I can improve things. This time I thought it would be nice to put some names to the amazing fouling biodiversity (I did this before for some seaweed images, see here). Crustaceans (tube-dwelling Jassa), Sponges, Bryozoans, Seaweeds but especially a lot of Tunicates (seasquirts; both solitary and colonial species). David Fenwick (of AphotoMarine fame) had a quick look to help with some IDs; there is a more there but this was not meant to be exhaustive. I have underlined species that are invasive. Anyway, I am sure I will post more of these types of images: the buoys are always there and these organisms do not swim off when you try to take a photo!