Serpulid worm.

Sand-covered serpulid worms?

A swimming polychaete worm?

Anemone attached to coral stalk? on hydrothermally altered rock face.

Purplish-balck anemone attached to rock outcrop

Glass sponge attached to rock outcrop.

Stalked white hexactinellida sponge

Hexactinellida sponges growing on rock face. The bluish gray sponges are among the most abundant animals seen in this Mid-Cayman Rise environment.

Sponge growing from rock face.

Hexactinellida sponge growing on sediment bridge between two large holes

White hexactinellida sponge growing on sediment

Brown sponge growing from junction of sediment-rock interface

Clear anemone? corallomorphian? with white spots at tips of tentacles

Large globular melon sponge

Large globular melon sponge

Clear anemone? corallomorphian? with white spots at tips of tentacles

White hexactinellida glass sponge known as a venus flower basket growing on sediment

White hexactinellida glass sponge known as a venus flower basket growing on sediment

Globular melon sponge and blue gray sponges attached to rock wall

Anemones? zooanthids? on what seems to be a very large dead coral branch in an area with little biota.

Frozen lava sheet flow

Small bamboo coral, porifera sponge knob, and cup corals

Blue gray sponges on a vitreous lava surface

Small sponges on vertical wall

Odd translucent material? lifeform? protruding from rock face on sheet flow.

Bent over Venus flower vase hexactinnelida Igor

Bristleworm on Venus flower vase sponge

Small translucent sponges on rock wall

Small translucent sponges on rock wall and small bamboo coral

Small translucent sponges on rock wall

Small translucent sponges on rock wall with large porifera rough knob sponge and small bamboo corals

Round fringed porifera sponge

Sponges adhering only to rock surfaces on mostly sediment covered rock wall.

Sponges adhering only to rock surfaces on mostly sediment covered rock wall.

Sponges adhering only to rock surfaces on mostly sediment covered rock wall on opposite sides of crevice.

Alcyonacean Anthomastus sp. coral

Ceriantharian tube anemone

Ceriantharian tube anemone

White sea anemones with white sponge at end of stalk

Closeup of white sea anemones on stalk

A ceriantharian tube anemone with its column buried in sediment.

A relatively large ceriantharian tube anemone close to 30 cm across from tip of tentacles to tips of tentacles.

A beautiful white glass sponge seemingly out of place in this stark environment

Stalked sponge in a barren landscape of white sand sediment

Closeup of stalked sponge in barren landscape with single small crustacean on stalk

Sponges on broken angular blocks of basalt

A large globular sponge.

Closeup of the sponge surface in image expl6657

Closeup of large white anemone.

Stalked sponge?