June 12, 2004

Portuguese Invasion (Not Euro Cup)

Constant offshore winds during wave season have carried small Portuguese Man-of-War (Physalia physalis) to the shores of Gorontalo. Rarely seen here, this marine creature is actually a colony of four different hydroid polyps, each with a different function in the colony. The most recognizable feature is its translucent, bluish bladder that is filled with nitrogen gas and floats on the ocean’s surface. This serves as a sail, carrying the colony to food sources. The three polyps that hang from the bladder are for paralyzing prey, digesting it by secreting enzymes, and for reproducing. Stings from the man-of-war’s tentacles can be quite dangerous to humans who are allergic. Portuguese Man-of-War are not present in Gorontalo waters during dive season. In fact, the day after we discovered them, the current had already carried them away.

Posted by Rantje at June 12, 2004 09:26 AM

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