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Didemnum vexillum - Sandwich Town Beach, Massachusetts, Images



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November 7, 2006
Image DB_STB_DSC3734.JPG.
Image DB_STB_DSC3734.

Image DB_STB_DSC3734. Tunicate colony of Didemnum sp on gravel seabed. Note oral lobes at the openings of oral siphons. Large openings are cloacal apertures; brown material in them is interpreted to be fecal matter in cavities below the apertures. Sandwich town beach (41 deg 46.11 min N lat, 70 deg 28.95 min W lon). Water depth 4 m. November 7, 2006. Observers: Dann Blackwood(USGS) and Sandra Baldwin (USGS). Photo credit: Dann Blackwood (USGS). Location no. 80.
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Image DB_STB_DSC3746.JPG.
Image DB_STB_DSC3746.

Image DB_STB_DSC3746. Image DB_STB_DSC3746. Tunicate colony of Didemnum sp on gravel seabed overgrowing red algae. Note oral lobes at the openings of oral siphons. Sandwich town beach (41 deg 46.11 min N lat, 70 deg 28.95 min W lon). Water depth 4 m. November 7, 2006. Observers: Dann Blackwood(USGS) and Sandra Baldwin (USGS). Photo credit: Dann Blackwood (USGS). Location no. 80.
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Image DB_STB_DSC3744.JPG.
Image DB_STB_DSC3744.

Image DB_STB_DSC3744. Tunicate colony of Didemnum sp on gravel seabed. Note oral lobes at the openings of oral siphons. Large openings are cloacal apertures; brown material in them is interpreted to be fecal matter in cavities below the apertures. Sandwich town beach (41 deg 46.11 min N lat, 70 deg 28.95 min W lon). Water depth 4 m. November 7, 2006. Observers: Dann Blackwood(USGS) and Sandra Baldwin (USGS). Photo credit: Dann Blackwood (USGS). Location no. 80.
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Image DB_STB_DSC3745.JPG.
Image DB_STB_DSC3745.

Image DB_STB_DSC3745. Tunicate colony of Didemnum sp on gravel seabed. Note oral lobes at the openings of oral siphons. Large openings are cloacal apertures; brown material in them is interpreted to be fecal matter in cavities below the apertures. Sandwich town beach (41 deg 46.11 min N lat, 70 deg 28.95 min W lon). Water depth 4 m. November 7, 2006. Observers: Dann Blackwood(USGS) and Sandra Baldwin (USGS). Photo credit: Dann Blackwood (USGS). Location no. 80.
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Image DB_STB_DSC3758.JPG.
Image DB_STB_DSC3758.

Image DB_STB_DSC3758. Tunicate colony of Didemnum sp on gravel seabed. Note oral lobes at the openings of oral siphons. Large openings are cloacal apertures; brown material in them is interpreted to be fecal matter in cavities below the apertures. Sandwich town beach (41 deg 46.11 min N lat, 70 deg 28.95 min W lon). Water depth 4 m. November 7, 2006. Observers: Dann Blackwood(USGS) and Sandra Baldwin (USGS). Photo credit: Dann Blackwood (USGS).Location no. 80.
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Image DB_STB_DSC3776.JPG.
Image DB_STB_DSC3776.

Image DB_STB_DSC3776. Tunicate colony of Didemnum vexillum Note oral lobes at the openings of oral siphons. Large openings are cloacal apertures; brown material in them is interpreted to be fecal matter in cavities below the apertures. Sandwich town beach (41 deg 46.11 min N lat, 70 deg 28.95 min W lon). Water depth 4 m. November 7, 2006. Observers: Dann Blackwood(USGS) and Sandra Baldwin (USGS). Photo credit: Dann Blackwood (USGS). Location no. 80.
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Image DB_STB_DSC3774.JPG.
Image DB_STB_DSC3774.

Image DB_STB_DSC3774. Tunicate colony of Didemnum vexillum Note oral lobes at the openings of oral siphons. Large openings are cloacal apertures; brown material in them is interpreted to be fecal matter in cavities below the apertures. Sandwich town beach (41 deg 46.11 min N lat, 70 deg 28.95 min W lon). Water depth 4 m. November 7, 2006. Observers: Dann Blackwood(USGS) and Sandra Baldwin (USGS). Photo credit: Dann Blackwood (USGS). Location no. 80.
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Image DB_STB_DSC3775.JPG.
Image DB_STB_DSC3775.

Image DB_STB_DSC3775. Tunicate colony of Didemnum vexillum Note oral lobes at the openings of oral siphons. Large openings are cloacal apertures; brown material in them is interpreted to be fecal matter in cavities below the apertures. Sandwich town beach (41 deg 46.11 min N lat, 70 deg 28.95 min W lon). Water depth 4 m. November 7, 2006. Observers: Dann Blackwood(USGS) and Sandra Baldwin (USGS). Photo credit: Dann Blackwood (USGS). Location no. 80.
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Image DB_STB_DSC3770.JPG.
Image DB_STB_DSC3770.

Image DB_STB_DSC3770. Tunicate colony of Didemnum vexillum Large openings are cloacal apertures; brown material in them is interpreted to be fecal matter in cavities below the apertures. Sandwich town beach (41 deg 46.11 min N lat, 70 deg 28.95 min W lon). Water depth 4 m. November 7, 2006. Observers: Dann Blackwood(USGS) and Sandra Baldwin (USGS). Photo credit: Dann Blackwood (USGS). Location no. 80.
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Image  DB_STB_DSC3773.JPG.
Image DB_STB_DSC3773.

Image DB_STB_DSC3773. Tunicate colony of Didemnum vexillum Note oral lobes at the openings of oral siphons. Large openings are cloacal apertures; brown material in them is interpreted to be fecal matter in cavities below the apertures. Sandwich town beach (41 deg 46.11 min N lat, 70 deg 28.95 min W lon). Water depth 4 m. November 7, 2006. Observers: Dann Blackwood(USGS) and Sandra Baldwin (USGS). Photo credit: Dann Blackwood (USGS). Location no. 80.
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Image  DB_STB_DSC3793.JPG.
Image DB_STB_DSC3793.

Image DB_STB_DSC3793. Tunicate colony of Didemnum vexillum overgrowing gravel. Large openings are cloacal apertures; brown material in them is interpreted to be fecal matter in cavities below the apertures. Sandwich town beach (41 deg 46.11 min N lat, 70 deg 28.95 min W lon). Water depth 4 m. November 7, 2006. Observers: Dann Blackwood(USGS) and Sandra Baldwin (USGS). Photo credit: Dann Blackwood (USGS). Location no. 80.
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Image DB_STB_DSC3765.JPG.
Image DB_STB_DSC3765.

Image DB_STB_DSC3765. Tunicate colonies of Didemnum sp overgrowing calcareous algae on gravel substrate. Sandwich town beach (41 deg 46.11 min N lat, 70 deg 28.95 min W lon). Water depth 4 m. November 7, 2006. Observers: Dann Blackwood(USGS) and Sandra Baldwin (USGS). Photo credit: Dann Blackwood (USGS). Location no. 80.
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Image DB_STB_DSC3739.JPG.
Image DB_STB_DSC3739.

Image DB_STB_DSC3739. Tunicate colony of Diplosoma listerianum overgrowing red algae on gravel seabed. Colony appears as a translucent film; small bluish-white dots represent granules of pigment surrounding zooids and cloacal apertures. Sandwich town beach (41 deg 46.11 min N lat, 70 deg 28.95 min W lon). Water depth 4 m. November 7, 2006. Observers: Dann Blackwood(USGS) and Sandra Baldwin (USGS). Photo credit: Dann Blackwood (USGS). Location no. 80.
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Image DB_STB_DSC3742.JPG.
Image DB_STB_DSC3742.

Image DB_STB_DSC3742. Tunicate colony of Diplosoma listerianum overgrowing red algae on gravel seabed. Small bluish-white dots represent granules of pigment surrounding zooids and cloacal apertures. Large opening in center of image is a cloacal aperture; brown fecal pellets are visible exiting from cloacal cavity below aperture. Sandwich town beach (41 deg 46.11 min N lat, 70 deg 28.95 min W lon). Water depth 4 m. November 7, 2006. Observers: Dann Blackwood(USGS) and Sandra Baldwin (USGS). Photo credit: Dann Blackwood (USGS). Location no. 80.
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Image DB_STB_DSC3741.JPG.
Image DB_STB_DSC3741.

Image DB_STB_DSC3741. Tunicate colony of Diplosoma listerianum overgrowing red algae on gravel seabed. Small bluish-white dots represent granules of pigment surrounding zooids and cloacal apertures. Large opening is a cloacal aperture; brown fecal pellets are visible in cavity below aperture. Sandwich town beach (41 deg 46.11 min N lat, 70 deg 28.95 min W lon). Water depth 4 m. November 7, 2006. Observers: Dann Blackwood(USGS) and Sandra Baldwin (USGS). Photo credit: Dann Blackwood (USGS). Location no. 80.
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Image DB_STB_DSC3766.JPG.
Image DB_STB_DSC3766.

Image DB_STB_DSC3766. Tunicate colony of Diplosoma listerianum; small bluish-white dots represent granules of pigment surrounding zooids. Sandwich town beach (41 deg 46.11 min N lat, 70 deg 28.95 min W lon). Water depth 4 m. November 7, 2006. Observers: Dann Blackwood(USGS) and Sandra Baldwin (USGS). Photo credit: Dann Blackwood (USGS). Location no. 80.
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Image DB_STB_DSC3761.JPG.
Image DB_STB_DSC3761.

Image DB_STB_DSC3761. Tunicate colony of Diplosoma listerianum on gravel seabed overgrowing small colony of Didemnum vexillum Small bluish-white dots represent granules of pigment surrounding zooids and cloacal apertures of D. listerianum. Large openings in both species are cloacal apertures. Sandwich town beach (41 deg 46.11 min N lat, 70 deg 28.95 min W lon). Water depth 4 m. November 7, 2006. Observers: Dann Blackwood(USGS) and Sandra Baldwin (USGS). Photo credit: Dann Blackwood (USGS). Location no. 80.
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Image DB_STB_DSC3762.JPG.
Image DB_STB_DSC3762.

Image DB_STB_DSC3762. Tunicate colony of Didemnum sp (pale yellow) surrounded by colony of Diplosoma listerianum. Large openings on surface of Didemnum vexillum are cloacal apertures; brown material in them is interpreted to be fecal matter in cavities below the apertures. Sandwich town beach (41 deg 46.11 min N lat, 70 deg 28.95 min W lon). Water depth 4 m. November 7, 2006. Observers: Dann Blackwood(USGS) and Sandra Baldwin (USGS). Photo credit: Dann Blackwood (USGS). Location no. 80.
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Image DB_STB_DSC3749.JPG.
Image DB_STB_DSC3749.

Image DB_STB_DSC3749. Tunicate colonies of Botryllus schlosseri (center) and Didemnum sp (right) growing on algae. Zooids of B. schlosseri are arranged in star-like pattern. Sandwich town beach (41 deg 46.11 min N lat, 70 deg 28.95 min W lon). Water depth 4 m. November 7, 2006. Observers: Dann Blackwood(USGS) and Sandra Baldwin (USGS). Photo credit: Dann Blackwood (USGS). Location no. 80.
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Image DB_STB_DSC3756.JPG.
Image DB_STB_DSC3756.

Image DB_STB_DSC3756. Tunicate colonies of Botryllus schlosseri and Didemnum sp ( top right) on gravel seabed. Two color morphs of B. schlosseri are present. Sandwich town beach (41 deg 46.11 min N lat, 70 deg 28.95 min W lon). Water depth 4 m. November 7, 2006. Observers: Dann Blackwood(USGS) and Sandra Baldwin (USGS). Photo credit: Dann Blackwood (USGS). Location no. 80.
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Image DB_STB_DSC3784.JPG.
Image DB_STB_DSC3784.

Image DB_STB_DSC3784. Tunicate colonies of Botrylloides violaceus. Note oral tentacles at openings of oral siphons; and new zooid buds within colonies and along margins of colonies. Sandwich town beach (41 deg 46.11 min N lat, 70 deg 28.95 min W lon). Water depth 4 m. November 7, 2006. Observers: Dann Blackwood(USGS) and Sandra Baldwin (USGS). Photo credit: Dann Blackwood (USGS). Location no. 80.
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Image DB_STB_DSC3752.JPG.
Image DB_STB_DSC3752.

Image DB_STB_DSC3752. Tunicate colonies of Botrylloides violaceus (red) being overgrown by colony of Didemnum vexillum (pale yellow) on gravel seabed. Note in foreground a colony of Diplosoma listerianum (overgrowing D. sp.); small bluish-white dots represent granules of pigment surrounding zooids and cloacal apertures. Sandwich town beach (41 deg 46.11 min N lat, 70 deg 28.95 min W lon). Water depth 4 m. November 7, 2006. Observers: Dann Blackwood (USGS) and Sandra Baldwin (USGS). Photo credit: Dann Blackwood (USGS). Location no. 80.
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Image DB_STB_DSC3751.JPG.
Image DB_STB_DSC3751.

Image DB_STB_DSC3751. Tunicate colony of Botrylloides violaceus (red) surrounded by colony of Didemnum vexillum (pale yellow) on gravel seabed. Note in foreground colonies of Diplosoma listerianum. Sandwich town beach (41 deg 46.11 min N lat, 70 deg 28.95 min W lon). Water depth 4 m. November 7, 2006. Observers: Dann Blackwood(USGS) and Sandra Baldwin (USGS). Photo credit: Dann Blackwood (USGS). Location no. 80.
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