Club Hydroid, Club-Headed Hydroid – Clava multicornis

, Club Hydroid, Club-Headed Hydroid - Clava multicornis, Clava multicornis

The Club Hydroid, also known as the Club-Headed Hydroid, scientifically classified as Clava multicornis, is a captivating marine organism belonging to the phylum Cnidaria. This hydrozoan exhibits a distinctive club-shaped morphology, contributing to its common names.

Description & Characteristics

Clava multicornis displays a unique club-shaped structure, reaching a maximum size of several centimeters in length. This distinctive shape sets it apart from other hydroids, making it easily recognizable. The organism’s body is typically composed of a stalk, a polyp, and a hydranth. The stalk is a slender, cylindrical structure that anchors the hydroid to its substrate. The polyp is a sac-like structure that houses the organism’s reproductive organs. The hydranth is a feeding structure that extends from the polyp and contains tentacles that capture prey. The tentacles are armed with stinging cells known as nematocysts, which paralyze prey.

Habitat and Occurrence

The Club Hydroid, Club-Headed Hydroid thrives in a diverse range of habitats. It is commonly found attached to various substrates including bollards, jetties, sea bridges, and even submerged oceanic plates. These hydroids also inhabit the intertidal zone, the tidal zone, and brackish water environments. They often flourish in seagrass meadows and eelgrass meadows, demonstrating their adaptability to different ecosystems.

Clava multicornis is a common inhabitant of the neritic zone, which encompasses the subtidal, sublittoral, and infralittoral regions of the ocean. This zone extends from the lower limit of the intertidal zone to the shelf edge, typically around 200 meters in depth. This wide distribution reflects the Club Hydroid, Club-Headed Hydroid‘s adaptability to varying depths and environmental conditions.

Taxonomy

The species Clava multicornis is classified within the Class: Hydrozoa, Order: Anthoathecata, and Family: Hydractiniidae. This placement within the taxonomic hierarchy underscores its evolutionary relationships with other hydroids and its shared characteristics.

Feeding

Clava multicornis is a carnivore, feeding on a variety of small invertebrates. Its diet consists primarily of copepods and cyclops, which it captures using its stinging tentacles. Brine shrimp nauplii are also a common food source, particularly in their larval stages.

Associated Species

Image References

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