Atlantic Beadlet Anemone

Fascinating facts about the Atlantic Beadlet Anemone

• Up to 192 tiny tentacles fan out in six perfect circles, giving the beadlet anemone a miniature sea-star look underwater. When the tide drops, those same tentacles snap shut and the whole animal shrinks to a red, brown, green or orange blob only about 5 cm (2 in) across. This dramatic shape-shift lets it cling to rocks in scorching sun or dry air, then flare out again to catch prey when submerged.
• A single beadlet anemone can hold as many as one hundred embryos inside its body cavity before launching them into the sea as free-swimming juveniles. One historic individual was discovered on Scotland's east coast in 1828 and kept spawning hundreds of offspring until it finally died in 1887. This viviparous strategy.
• The beadlet anemone tolerates a temperature window of roughly 18.7 °C to 19.9 °C for optimal growth, yet it can also survive extreme heat, drying out, and even being completely out of water on exposed rocks. This physiological flexibility lets it thrive from the splash-zone up to 20 m (65.62 ft) deep, and even endure being buried in sand after a storm.
• Weighing only 0.01 g to 0.84 g when dry, the beadlet anemone's body mass swells dramatically when water fills its tissues and gastrovascular cavity, turning a feather-light blob into a fleshy predator. Its unbanded tentacles, each tipped with cnidoblasts that house stinging nematocysts, can launch toxins that paralyze prey ranging from tiny insects to larger gastropods. This rapid, venom-driven capture system underpins its reputation as a voracious carnivore in the intertidal food web.
• Only one predator dares to eat the beadlet anemone: the grey sea slug Aeolidia papillosa, which can ingest the anemone's toxic nematocysts without being harmed. This rare predator-prey relationship shows that even the most potent cnidarian defenses can be bypassed.

Sources

Every fact above was checked against these pages, and kept only where one of them states it.

• Wikipedia
• Animal Diversity Web

At a glance

About the Atlantic Beadlet Anemone

In the vibrant tapestry of the ocean's edge, the Atlantic Beadlet Anemone weaves its own unique thread, its delicate, gem-like tentacles swaying gently in the currents like a chorus of ethereal dancers. As it moves through the world, it is a master of subtle, almost imperceptible shifts, its very presence a testament to the beauty of stillness and patience. With its ability to thrive in the harsh, wave-battered intertidal zones, this tiny, unassuming creature is a remarkable exemplar of resilience and adaptability.

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