Dive into the Colourful World of Nudibranchs in Plettenberg Bay
Often referred to as “sea slugs,” nudibranchs are anything but ordinary. The term “nudibranch” originates from the Latin word “nudus” meaning ‘naked,’ and the Greek word “brankhia” which translates to ‘gills.’ Their exposed gills help distinguish nudibranchs from flatworms. These fascinating marine mollusks captivate with their dazzling array of colors and intricate patterns, making them the underwater equivalent of living works of art.
The nudibranchs found in Plett’s ocean add an extra splash of color to the already vibrant reefs. Their stunning beauty is matched only by their incredible diversity, with shapes and sizes that range from whimsically delicate to boldly extravagant.
L – R: Polycera capensis (Crowned Nudibranch), Trapania cirrita (White Lined Nudibranch), Hypselodoris capensis (Cape Dorid)
One of the most captivating features of nudibranchs is their vibrant color palette. These eye-catching shades serve an essential purpose: they act as a warning to potential predators that the nudibranchs may be toxic or unpalatable. This brilliant display of colors is not just for show—it’s a clever survival strategy.
As opportunistic feeders, nudibranchs primarily consume sponges, hydroids, and other small invertebrates. This feeding behavior helps maintain the balance of their ecosystems, making their presence a sign of a healthy marine environment. They play a vital role in the complex web of life beneath the waves.
L – R: Bonisa nakaza, Black-spotted longhorndorid Thecacera, Polycera capensis (Crowned Nudibranch)
If you’re eager to catch a glimpse of these colorful creatures, grab your snorkel gear! Nudibranchs can be found in oceans all around the world, from tropical reefs to temperate waters. They often hide among corals, sponges, and rocks, making them a delight to discover for snorkelers and divers alike.
L – R: Cratena capensis – notice the egg ribbons to the left of the slug, Goniobranchus heatherae (Red Spotted Nudibranch), Bonisa nakaza (Gasflame Nudibranch)
Images supplied by Peter Berndt & ProDive
