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Hydro-Powered Holothurians: California Sea Cucumbers

During a late afternoon dive several years ago in Fiji, I came across a sea cucumber (Bohadschia graeffei) that was upright and swaying like a cobra dancing to a snake charmer’s tune. That was very strange and I didn’t know what to make of it. I watched for a while, swam away, then came back, intending to photograph the sea cuke’s mouth and the tentacles surrounding it, which were black with flat, leafy white tips.  That’s when things got stranger. Rising in the water from […]

The Sequential Life of the California Sheephead

Many marine animals are hermaphrodites. Nudibranchs, for instance. It is thought that being able to mate with any same species creature encountered on the reef gives hermaphrodites a better chance of reproducing.  Many fish, gastropods and plants are sequential hermaphrodites. Instead of having both sexes mature in their bodies at the same time, they start life as one sex and become another later. Protandrous creatures change from male to female. Protogynous creatures change from female to male. According to Wikipedia: “About 75 percent of all […]

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