Biodredge

Station: Biodredge / San Pedro Shelf (Rock Pile)
Date: 12/02/17, 9:27 am
Conditions: 67°F, sunny, winds N 2mph
Start: 33° 40' 18'' N, 118° 14' 58'' W
End:   33° 40' 25'' N 118° 14' 24'' W

We use a method called "Otter Trawling" or Midwater Trawling to collect pelagic = swimming) organisms. "Otter" refers to the rectangular boards on the net. Hydrodynamic forces act on the boards, keeping them apart and the net open.

All organisms were returned to the ocean.

  • Holdfast
  • Holdfast
  • Holdfast
  • Bivalves on a holdfast
  • Turkish Towel
  • Articulated Coralline Algae
  • Cup Coral
  • Crab (top)
  • Crab (bottom)
  • Hermit Crab
  • Rock Crab
  • Rock Crab
  • Rock Shrimp
  • Sand Dollar (top)
  • Sand Dollar (bottom)
  • Sand Stars
  • Reticulated Brittle Star
  • Reticulated Brittle Star
  • Reticulated Brittle Star
  • White Urchin
  • White Urchin
  • White Urchin
  • Kellet's Whelk
  • Kellet's Whelk
  • Kellet's Whelk
  • Olive Snail
  • Olive Snail
  • Wentletrap (top)
  • Wentletrap (bottom)
  • Worm
  • Worm