3 photos - 2 species


 This species of snail lives in calcareous tubes in large coral blocks.

A gland produces a mucus net to catch plankton,

which is retrieved approximately every 15 minutes.

They are active both day and night.

Ceraesignum maximum

Vermitid worm shell

Maximum diameter 1.5 cm

Length up to 20 cm, ingrown in corals. 

Photos 1 - 2 Johnny: Hurghada Egypt

Thylacodes grandis

Grand coral worm snail

This species of snail builds a calcareous tube on solid substrates.

Due to their appearance,

they are sometimes confused with tubeworms of the family Serpulidae.

Like all worm snails, it feeds on microorganisms,

which it captures with mucus threads.

Threads are drawn in together with the microorganisms and eaten.

Photo 1 Johnny: Bangka Island: North Sulawesi