Hemprichs Bäumchenkoralle

Overview

Dendronephthya hemprichi is a vibrant, arborescent soft coral widely distributed from the Red Sea across the Indo-Pacific region. Recently, it has been documented as an invasive species in the Mediterranean Sea, where it is expanding its range due to its ability to rapidly colonize new surfaces.

Appearance

This species typically displays striking pink or orange coloration, contrasted by a translucent trunk. Its structure is supported by internal calcareous elements known as sclerites, which provide the necessary rigidity for the colony to maintain its shape in water currents. The polyps, which feature eight pinnate tentacles, are clustered at the ends of the branches.

Biology & behavior

Unlike many reef-building corals, D. hemprichi is azooxanthellate, meaning it does not rely on symbiotic algae for energy. It is a highly adaptable species that reproduces both sexually through broadcast spawning and asexually via clonal propagation. In the latter process, small fragments break off and develop root-like processes to attach to new substrates, a trait that facilitates its rapid spread on both natural reefs and artificial structures like shipwrecks.

Feeding

As a passive suspension feeder, this coral relies on water flow to deliver nutrients. It feeds primarily on phytoplankton, using its feathery tentacles to capture microscopic particles from the water column. It thrives in areas with moderate to strong currents, which are essential for maintaining the high particle encounter rates required for its growth and survival.