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Figure 4.Ophioderma peruana sp. n.non-type preserved material (alcohol) showing different colors variations. A specimen in situ B CZA-394 (14 mm DD) radial shields naked C CZA-392 (28 mm DD) radial shields naked D CZA-390 (35 mm DD) radial shields covered by disc granules.

Figure 6.Ophioderma panamensis. A dorsal view B dorsal view of the arm C ventral view of the arm D dorsal view of the disk E ventral view of the disk F jaw. Scale bar = 5 mm. Ophioderma teres juvenile G dorsal view. Scale bar = 5 mm H dorsal view of the arm (dp = divided dorsal arm plates) I ventral view of the arm J dorsal view of the disk K ventral view of the disk L jaw. Scale bar = 1 mm.

All Biocode files are based on field identifications to the best of the researcher’s ability at the time.

All Biocode files are based on field identifications to the best of the researcher’s ability at the time.

All Biocode files are based on field identifications to the best of the researcher’s ability at the time.

All Biocode files are based on field identifications to the best of the researcher’s ability at the time.

All Biocode files are based on field identifications to the best of the researcher’s ability at the time.

All Biocode files are based on field identifications to the best of the researcher’s ability at the time.

All Biocode files are based on field identifications to the best of the researcher’s ability at the time.

All Biocode files are based on field identifications to the best of the researcher’s ability at the time.

All Biocode files are based on field identifications to the best of the researcher’s ability at the time.

All Biocode files are based on field identifications to the best of the researcher’s ability at the time.

All Biocode files are based on field identifications to the best of the researcher’s ability at the time.

All Biocode files are based on field identifications to the best of the researcher’s ability at the time.

Here is a quick clip of the sea urchin, Strongylocentrotus purpuratus, taken by Adrian Reich of the Wessel Lab at Brown University. You can see the animal's tube feet moving between its spines. Check out creaturecast.org/archives/1085-tube-vision to read about how urchins might use these feet and spines to focus light and see shapes around them. Together the structures might function like a large compound eye.This work is provided under a Creative Commons Attribution-Noncommercial Share-Alike license.

Item Type: Image Title: Anseropoda placenta Copyright: SERPENT Project Species: Anseropoda placenta Site: Atlantic -- North Sea -- West of Shetland -- LancasterNorth Sea -- West of Shetland -- Lancaster Site Description: Seafloor Depth (m): 147 Latitude: 60 deg 11' 13" N Longitude: 3 deg 51' 18" W Countries: UK -- West of Shetland Habitat: benthic Rig: Sedco 712 Project Partners: Hurricane Energy, Transocean, Fugro ROV: Fugro Deposited By: Dr Andrew Gates Deposited On: 20 October 2014

Description: 250 mm total length. Synallactid holothurian. This is most likely Mesothuria sp. There is a possibility that the genus is Paroriza. Item Type: Image Title: Sea Cucumber Copyright: SERPENT project Species: Mesothuria sp. Behaviour: Feeding on the seabed. Site: Atlantic -- South Atlantic -- Nigeria -- Akpo fieldAtlantic -- Central Atlantic -- Nigeria -- Akpo field Site Description: Seafloor Depth (m): 1366m Latitude: 3 deg 07' 00" N Longitude: 6 deg 49' 00" E Countries: West Africa -- Nigeria Habitat: Benthic Rig: Jack Ryan Project Partners: Total, Transocean, Oceaneering ROV: Millennium 43 Deposited By: Mr R Curry Deposited On: 09 December 2009

Synaptula lamperti is not the primary subject of the video clip; the primary subject is Xestospongia testudinaria (Barrel sponge). Coral Sea, Duration 17 seconds

South Pacific Ocean, Shot at night, Duration 13 seconds

Coral Sea, Duration 10 seconds

Coral Sea, Duration 5 seconds

Colochirus sp. is not the primary subject of the video clip; the primary subject is Pseudocolochirus violaceaus (Sea apple). Indo-Pacific, Duration 34 seconds

South Pacific Ocean, Duration 9 seconds