Sessile organisms such as macroalgae located in the intertidal and shallow subtidal zones are subject to a hydrodynamically diverse environment, controlling variation of intraspecific morphology distribution. Kelp forests experience both waves and/or currents, yet, how kelp blade material mechanically differs between these various hydrodynamic environments what drives strength extensibility not...

Cymodoce truncata (Leach, 1814), the type species of the genus, C. zanzibarensis (Stebbing, 1910) and C. richardsoniae (Nobili, 1906) are redescribed based on type specimens or topotypic material, and a neotype is designated for Cymodoce richardsoniae. A revised generic diagnosis and description is provided for the genus Cymodoce. Cymodoce delvarii sp. nov. is described from the subtidal zone o...

Sargassum kendrickii N. Goldberg et Huisman, sp. nov. is described from subtidal habitats in the Esperance region, southern Western Australia. The new species belongs to the subgenus Phyllotrichia and can be distinguished from all previously described species in the morphology of its lateral branches, which are pinnate, alternately arranged, and have serrated margins. Vesicles are absent and re...

the materials of this study were collected from intertidal and shallow subtidal habitats of the hengam island coasts from may 2013 to may 2014. a total of 10 species representing eight genera and four families are reported as follows: sphaeromopsis persikolpos khalaji-pirbalouty and wägele 2009, s. sarii khalaji-pirbalouty and wägele 2009, sphaeroma khalijfarsi khalaji-pirbalouty and wägele 201...