Actinia tabella

, Actinia tabella

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Actinia tabella is a species of sea anemone found in a variety of coastal habitats. It is commonly referred to as the “sand anemone” due to its frequent occurrence in sandy environments. This small but striking anemone is characterized by its vibrant color and unique morphology, making it a fascinating subject of study for marine biologists and enthusiasts alike.

Description & Characteristics

Actinia tabella is a relatively small sea anemone, typically reaching a maximum size of about 5 cm in diameter. Its body is cylindrical and can be brightly colored, ranging from shades of red and orange to brown and green. The anemone possesses a distinctive, ring-shaped mouth surrounded by numerous tentacles that are used for capturing prey. These tentacles are covered in stinging cells called nematocysts, which help the anemone paralyze and subdue its food.

Habitat and Occurrence

Actinia tabella exhibits a preference for sandy and rocky substrates, often found in shallow coastal waters. Its distribution is widespread, encompassing regions of the Atlantic Ocean, including the Mediterranean Sea. This species is commonly observed in the intertidal zone, where it is exposed to fluctuating tides and water conditions, showcasing its resilience and adaptability. Actinia tabella is also a regular inhabitant of the subtidal zone, a region that remains submerged even at low tide.

Taxonomy

Actinia tabella is scientifically classified as a member of the phylum Cnidaria, which encompasses a diverse array of aquatic organisms known for their stinging cells. This species belongs to the Class: Hexacorallia, a group of cnidarians characterized by their six-fold radial symmetry. The order Actiniaria further classifies Actinia tabella as a sea anemone, while the Family Actiniidae encompasses a broader group of anemones that share several characteristics with Actinia tabella.

Feeding

Actinia tabella is a carnivorous predator, primarily relying on a diet of small invertebrates, such as crustaceans and worms. When prey ventures within reach of its tentacles, the anemone’s stinging cells deliver a potent venom that paralyzes the victim. The tentacles then bring the prey to the anemone’s mouth, where it is consumed and digested. Actinia tabella displays opportunistic feeding behavior, capturing whatever prey happens to be within reach.

Associated Species

Image References

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