Balanus is one of invertebrate sea animal. Balanus has hard carapace covering all its body, made from cement. When still a larva, Balanus will swim like a plankton, until being adult, and then will be attach to other such as other animal carapace, and even in the wreck. Balanus has a very good adaptation to environmental changes, and easily due to hermaphrodite fertilization. Balanus are also dispersed by ships where they are attached to. (Pipit Puji Lestari, Marlia Yulianti Rosyidah, Febri Wijanarko, Iwan SB) Plese click here
 has hard carapace covering all its body, made from cement. When still a larva, Balanus will swim){kind=link}