Showing posts with label Portuguese Man o' War. Show all posts
Showing posts with label Portuguese Man o' War. Show all posts

Wednesday, August 26, 2009

Portuguese Man o' War


The Portuguese man-of-war is a siphonophore, an animal made up of a colony of organisms working together. It has an air bladder that allows it to float on the surface of the ocean. This sail is translucent and tinged blue, purple or mauve. The sail may extend 15 centimetres above the water may be 9 to 30 centimetres long . To escape a surface attack, the sail can be deflated allowing the Man O' War to briefly submerge .
Below the main body dangle long tentacles, which occasionally reach 50 metres (165 ft) in length below the surface. Each tentacle bears stinging venom-filled nematocysts which sting and kill small sea creatures such as small fish and shrimp.
Certain fish are able to live among the tentacles (being nearly immune to the poison from the stinging cells) and have a commensal symbiotic relationship.
The Loggerhead Turtle feeds on the Portuguese Man O' War; indeed it is a common part of its diet. The skin of the turtle is too thick for the Portuguese Man O' War sting to penetrate and launch its venom.

The Loggerhead Turtle feeds on the Portuguese Man O' War; indeed it is a common part of its diet. The skin of the turtle is too thick for the Portuguese Man O' War sting to penetrate and launch its venom.



The sea slug also feeds on the Portuguese Man O' War, as does the violet snail Janthina janthina.

Other predator are: Blanket, octopuses, sea slug Glaucus atlanticus.