Poecilosclerida Topsent 1928

Figure 11.Hymedesmia (Hymedesmia) rissoi. A Tornote, sometimes modified into subtylotes and strongyles B Acanthostyles C Arcuate isochelae D Thin sigmas.

Description: Giant carniverous club sponge Item Type: Image Title: Giant club sponge Copyright: SERPENT project Species: Chondrocladia gigantea Behaviour: Attached to seafloor. Site: Atlantic -- North Sea -- West of Shetland -- TornadoNorth Sea -- West of Shetland -- Tornado Site Description: Seafloor Depth (m): 1050 Latitude: 60 deg 33' 44" N Longitude: 4 deg 27' 23" W Countries: UK -- West of Shetland Habitat: benthic Rig: Stena Carron Project Partners: OMV, Oceaneering, Stena ROV: Magnum 156 Deposited By: Dr Daniel Jones Deposited On: 21 December 2009

Figure 12.Mycale (Paresperella) serrulata. A–B Mycalostyles B Large anisochelae C Small anisochelae D Magnifications of the serrated edge of a sigma.

Description: Giant carniverous club sponge Item Type: Image Title: Giant club sponge Copyright: SERPENT project Species: Chondrocladia gigantea Behaviour: Attached to seafloor. Site: Atlantic -- North Sea -- West of Shetland -- TornadoNorth Sea -- West of Shetland -- Tornado Site Description: Seafloor Depth (m): 1050 Latitude: 60 deg 33' 44" N Longitude: 4 deg 27' 23" W Countries: UK -- West of Shetland Habitat: benthic Rig: Stena Carron Project Partners: OMV, Oceaneering, Stena ROV: Magnum 156 Deposited By: Dr Daniel Jones Deposited On: 21 December 2009

Description: A carnivorous giant club sponge and a sabellid tubeworm Item Type: Image Title: Chondrocladia gigantea Copyright: SERPENT Project Species: Chondrocladia gigantea Site: Atlantic -- Norwegian -- Midnattsol Site Description: Seafloor Depth (m): 928 Latitude: 64 deg 00' 59" N Longitude: 5 deg 16' 44" E Countries: Norway -- Norwegian Sector Habitat: Benthic Rig: Transocean Leader Project Partners: Statoil, Oceaneering, Transocean ROV: Magnum 034 (work class) Deposited By: Dr Andrew Gates Deposited On: 19 November 2010

Description: A specimen has earlier been taken at about 60°N, 5°E, about 1140 m. Otherwise, the species is distributed at large depths in the Norwegian-Greenland Sea. Carniverous. Item Type: Image Title: Sponge Cladorhiza gelida Copyright: SERPENT project Species: Cladorhiza gelida Behaviour: Attached to seafloor. Site: Atlantic -- North Sea -- West of Shetland -- TornadoNorth Sea -- West of Shetland -- Tornado Site Description: Seafloor Depth (m): 1050 Latitude: 60 deg 33' 44" N Longitude: 4 deg 27' 23" W Countries: UK -- West of Shetland Habitat: benthic Rig: Stena Carron Project Partners: OMV, Oceaneering, Stena ROV: Magnum 156 Deposited By: Dr Daniel Jones Deposited On: 21 December 2009

Description: Digital still collected as part of CODEMAP Item Type: Image Copyright: CODEMAP Species: Hymedesmia Site: Atlantic -- Rockall Bank Site Description: Seafloor Depth (m): 217 Latitude: 57 deg 57' 09" N Longitude: 13 deg 58' 41" W Habitat: Bank Rig: RRS James Cook ROV: SeaEye Lynx Deposited By: Ms Katleen Robert Deposited On: 03 October 2013

Description: blue encrusting sponge, common Item Type: Video Title: Blue sponge (Hymedesmia sp.) Species: Hymedesmia sp. Behaviour: filter feeder, encrusted on hard substrates Site: Atlantic -- North Sea -- West of Shetland -- SchiehallionNorth Sea -- West of Shetland -- Schiehallion Site Description: Seafloor Depth (m): 350 Latitude: 60 deg 20' 03" N Longitude: 4 deg 05' 56" W Countries: UK -- West of Shetland Habitat: Temperate Muddy Sand Rig: Paul B Loyd Junior Project Partners: Transocean, Subsea 7, BP ROV: Pioneer 9 Deposited By: Rob Curry Deposited On: 13 March 2007

Item Type: Video Title: Blue sponge (Hymedesmia sp.) Species: Hymedesmia sp. Behaviour: encrusting filter feeder. With sea urchin (Echinus sp.) Site: Atlantic -- North Sea -- West of Shetland -- SchiehallionNorth Sea -- West of Shetland -- Schiehallion Site Description: Seafloor Depth (m): 350 Latitude: 60 deg 20' 03" N Longitude: 4 deg 05' 56" W Countries: UK -- West of Shetland Habitat: Temperate Muddy Sand Rig: Paul B Loyd Junior Project Partners: Transocean, Subsea 7, BP ROV: Pioneer 9 Deposited By: Rob Curry Deposited On: 13 March 2007

Forms encrusting blue sheets. Symbiotic bacteria are responsible for the blue color. Photographed at Cypress Cove, Point Lobos, 17 m.

Myxilla incrustans sponge on a Chlamys hastata scallop. (Photo by: Dave Cowles)

These are torn sponge fragments. Myxilla incrustans is yellow and Mycale adhaerens is purple. Note the more stringy appearance of the Mycale. Scale is millimeters. Photo by Dave Cowles, July 2005.

In this underwater photo Mycale adhaerens is attached to its host scallop, which in turn is attached to a rock. Photo by Jim Nestler July 2005

Mycale adhaerens is not limited to growing on scallops. The sponge shown below is often found growing in Padilla Bay near March Point June 2006. It is tan with yellowish parts when fresh and quickly fades to all tan after being collected. According to the spicules and growth form this is also Mycale adhaerens.

Mycale adhaerens sponges of different hues on Chlamys hastata scallops. The scallop on the right also has a Myxilla incrustans sponge growing on the lower valve (not visible). Collected at 15 m depth, Coffin Rocks. (Photo by: Dave Cowles, July 2005)