Tube worm with translucent stalked on rock to left and grayish white sponges on rock. Legs of a pycnogonid sea spider are visible as well.

A large pycnogonid sea spider with tube worm, sponges, and translucent stalked tunicate.

A variety of life on an rock outcrop including a stalked sponge, translucent white sponges, at least one tube worm, and small green octocorals (look hard to find).

A variety of life on an rock outcrop including a stalked sponge, translucent white sponges, at least one tube worm, and small green octocorals (look hard to find).

A gouge in the seafloor. What could cause this?

A radial pattern reminiscent of lunar impact craters. However, probably caused by digging animals.

Radiating pattern in depression with burrow evident as well. A variety of animals plow up the seafloor and redistribute the sediment.

Large holes in the sandy sediment probably caused by burrowing animals

Closeup of large holes in the sediment.

Closeup of large holes in the sediment.

A large hole in the sediment showing the capacity of these sorts of features to disturb surficial seafloor sediments.

A large hole with what appears to be a tiny burrow at the bottom . The two red dots at the upper right are probably 10 cm apart. Thus the hole is at least a meter and probably more across.

Large holes and depressions in the sediment

A large hole within a hole. The red dots are 10 cm apart. Thus the bottom "squared off" hole is at least a 1/3 of a meter cross, while the larger surrounding hole is more than a meter across.

A holothurian on a mottled bright and dark sand sea floor.

A large stone and a mat of shells cover the bottom of a hole in the sediment.

A linear gouge in the seafloor. What does this?

A large hole in the sediment at the top of a ridge.

A large hole with a large burrow continuing downward at its bottom.

A hole with coarse shells and sediment as well as some marine vegetations covering its bottom.

Small shells at the bottom of a hole in the sediment

A series of very deep, very large holes that appear to be interconnected.

A gouge in the sea floor that appears to be relatively old.

The hole at the bottom of a hole. How far down does this hole go in the sediment ?

A comparatively gently sloping hole with coarse material at its bottom.

Three lineal gouges in a row and a fourth trending in a different direction at the top of the image. Two reddish purple holothurians are crawling over the middle of the parallel gouges.

A large hole in the sediment

Shell and other biological detritus covering the bottom of a hole in the sediment.

A large gouge and parallel ridge-like pile of material in the sediment.

A very deep vertical hole in the sediment.

A deep hole and a large mound. Rock is outcropping in the distance.

Hole with course detritus in the bottom.

Large hole with streak of course detritus in bottom

Shells and other biological detritus at bottom of hole in sediment.

Small holes at the bottom of a sedimentary layer

An arcuate gouge leading into another lineal gouge in the sediments of the seafloor.

What appears to be a burrow at the end of a lineal gouge with a pile of sedimentary material to the right of the gouge.

Three burrows in the sediment with the hint of a possible creature in the bottom middle burrow.

Maybe two legs of a brittle star poking out from a burrow.

A pile of sediment with no hole or burrow apparent. What is the black material animate or inanimate?- to the left of the pile.

Random motion of some bottom crawling animal recorded in sand tracks.

Random motion of some bottom crawling animal recorded in sand tracks.

Large gouge in sediment

Large gouge in sediment with accompanying large pile of sediment

Large gouge in sediment with accompanying large pile of sediment

Two seemingly divergent tracks leading to the same gouge pattern in the surface sediments

Large gouge in sediment

Tube anemone in bottom of circular hole.

Sand dung pile amongst material that looks to be in bottom of hole.

Small holes with radial patterns extending outward from the hole