Trumpet Anemone

Overview

The trumpet anemone (Aiptasia mutabilis) is a distinctive sea anemone known for its slender, trumpet-shaped column that flares outward toward a broad oral disc. It is a common inhabitant of rocky environments, often found partially hidden within crevices or sheltered surfaces where it can quickly retract when disturbed.

Appearance

This species typically features a smooth, brownish column that can reach up to 12 cm in height. It possesses approximately 100 tentacles that are characteristically pointed and arranged in a graduated pattern, with inner tentacles often being longer than the outer ones. These tentacles are frequently translucent with marbled patterns in shades of brown, green, or blue, sometimes displaying white markings. Small, inconspicuous pores known as cinclides are located along the mid-column.

Distribution & habitat

Aiptasia mutabilis is found throughout the Mediterranean Sea and parts of the northeastern Atlantic Ocean, ranging from the British Isles down to the coast of West Africa. It favors rocky reefs, gravelly substrates, and areas with algal growth, typically occupying shallow waters from the surface down to 50 meters.

Biology & behavior

These anemones are often solitary but can be found in groups. They are equipped with specialized stinging cells called nematocysts used for protection and capturing prey. In some shallow-water environments, they host symbiotic algae known as zooxanthellae. When threatened, they can rapidly retract into their rocky retreats. They are capable of both sexual reproduction and asexual multiplication through pedal laceration, a process where small fragments of the base break off to develop into new individuals.