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Megabalanus tintinnabulum (Linnaeus, 1758)
Megabalanus tintinnabulum is a filter feeder like other acorn barnacles as well. Specially adapted legs called cirri are extended through the opening at the top of the shell and are waved about at right angles to the flow of water past the shell. Food particles are caught by these and the cirri are periodically withdrawn into the shell and the food scraped off.
Eggs of Megabalanus tintinnabulum are fertilized internally and start to develop into larvae within a few days. These are planktonic and disperse in the water column. They pass through six naupliar stages and one cypris larval stage before settling on the seabed, undergoing metamorphosis and developing into juveniles. These cement themselves to the substrate and remain sessile for the rest of their lives.
Class: Maxillopoda
Order: Sessilia
Family: Balanidae
Species: Megabalanus tintinnabulum
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Megabalanus tintinnabulum is a filter feeder like other acorn barnacles as well. Specially adapted legs called cirri are extended through the opening at the top of the shell and are waved about at right angles to the flow of water past the shell. Food particles are caught by these and the cirri are periodically withdrawn into the shell and the food scraped off.
Eggs of Megabalanus tintinnabulum are fertilized internally and start to develop into larvae within a few days. These are planktonic and disperse in the water column. They pass through six naupliar stages and one cypris larval stage before settling on the seabed, undergoing metamorphosis and developing into juveniles. These cement themselves to the substrate and remain sessile for the rest of their lives.
Class: Maxillopoda
Order: Sessilia
Family: Balanidae
Species: Megabalanus tintinnabulum
hma
