seen? Tiny ones that form tubes are sometimes seen encrusting
sponges and other immobile creatures on the shore.
Spionids are generally small slender active worms. They have tentacles
(palps) on the head that are used for feeding. Some may feed by gathering
particles that deposit on the surface using a pair of long feeding
palps that is grooved with tiny hairs (cilia) that transport the particles
along the palps to the mouth. The palps may also be used to gather
plankton and particles suspended in the water. Other spionid worms
burrow in the sand. Spionoid worms may live in tubes made of sand
or wander freely.
Spionid sponge worms (Polydorella sp.)* can be common
but are often overlooked. About 0.5cm long. Tiny short beige tubes.
Often found in large numbers, encrusting a surface spacing themselves
out regularly, at a distance equalling the length of their tentacles.
identification. Species are difficult to positively identify without close
On this website, they are grouped by external features for convenience of
worms on Singapore shores
Terrence M., David W. Behrens and Gary C. Williams. 1996. Coral
Reef Animals of the Indo-Pacific: Animal life from Africa to Hawaii
exclusive of the vertebrates
Sea Challengers. 314pp.