It feeds mostly on zooplankton , but also consumes sediment and detritus when necessary .
Amphiura filiformis lives submerged in soft substrate with part of its arms projecting above the surface of the sand for the purpose of suspension feeding and gas exchange .
Amphiura filiformis feeds mostly on zooplankton , but also consumes sediment and detritus when necessary .
Amphiura filiformis lives submerged in soft substrate with part of its arms projecting above the surface of the sand for the purpose of suspension feeding and gas exchange .