Sea urchin respirometry

I have been working out how much my sea urchins are using up oxygen using closed chamber respirometry jars. The amount of oxygen consumed by the urchins is an indicator of metabolism, and possibly stress. To measure the oxygen content of the seawater in the jar, I can place a fiber optic cable onto the…

Heart Shaped Predator

Phyllolithodes papillosus Brandt, 1848 Apart from the obvious delicacy and beauty of this specimen, which overwhelmed me when I first saw it, it was actually the ‘u’ shaped depression in the middle of the dorsal side of this specimen that caught my eye. It looks spectacular and, now that the specimen is bleached of it’s…