Acromegalomma circumspectum is a species of segmented worms in the family feather duster worms. It is a suspension feeder. Individuals can grow to 100 mm. Acromegalomma circumspectum is a sessile animal.
Definition: aquatic organisms that construct and inhabit simple unbranched vertical shafts with only one opening to the surface. These are primarily above-sediment filter-feeders, surface deposit-feeders, and subsurface deposit-feeders (head-down, conveyor-belt feeders)