Spanish shawl, Flabellina iodinea
This spanish shawl (Flabellina iodinea) appears to be in danger of
becoming a colorful snack for a onespot fringehead (Neoclinus
uninotatus). Thankfully for the shawl, its wild coloration is indicative of
it's ability to sting potential predators. Spanish shawls rove the reef in
search of the hydroids upon which they feed. Interestingly enough, a shawl's
stinging ability comes from special cells called nematocysts which are captured
from prey and passed through the digestive system without being discharged. It's
possible that this fringehead wasn't interested in the passing slug because it
was familiar with its defense mechanism. However, I suspect that it's more
likely the fish was entirely unaware of its visitor. Fringeheads, apparently,
have poor eyesight. I've seen them out hunting -- they're quite prone to
mistaking rocks for prey.
"Anchor Farm", Monterey Bay, California
December 4, 2004
The vibrant colors of a Spanish shawl (Flabellina iodinea) provide
photographers with great raw material. Of course, there's always a catch: These
inch-long slugs flap violently in the surge like one of those cat toys made from
rubber bands on the end of a stick. As such, getting the rhinophores in focus is
often an exercise in frustration. Even a really good macro lens has difficulty
autofocusing on this type of subject. This shot was taken using a fixed focus
and fine movements of the photographer's hand to achieve focus by moving the
entire camera forward and backwards. The blurry orange arms are those of a blood
star (Henricia leviuscula).
"Shale Island", Monterey Bay, California
February 17, 2007
Close-up of a spanish shawl (Flabellina iodinea).
"Tanker Reef", Monterey Bay, California
April 2, 2006
