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Region: PAC

Geographic Zones: Johnson's Rocks

Survey Types: Fish Only, Invertebrates Only, Fish & Invertebrates

Dates: 1/1/93 - 10/3/24

Total Surveys: 11

#Species Reported: 65

Average Species Reported on a Survey by Expert Surveyors: 23.50

Average Species Reported on a Survey by Novice Surveyors: 17.44

Survey Type: FO = Fish Only; IO = Invertebrates Only; FI = Fish & Invertebrates - How to interpret REEF data?
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Click a column header to sort by that column. Hold shift and click to sort by multiple columns

SurveysBottom Time
ExpertNovice
CodeNameFOIOFIFOIOFI(H:M)
4California0025048:33
42SOUTHERN CALIFORNIA0025048:33
4203Southern Channel Islands0025048:33
420302Catalina Island0025048:33
42030246Johnson's Rocks0025048:33
TOTALS0025048:33

Species

%SF = Sighting Frequency; DEN = Density Score - How to interpret REEF data?
Bar length corresponds to sighting frequency
Color saturation corresponds to density score
Click + to display species image and additional information.
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Garibaldi - Damselfish
(Hypsypops rubicundus)
SF: 90.91% | DEN: 3.1
Crowned Urchin - Echinoderms
(Centrostphanus coronatus)
SF: 83.33% | DEN: 3.2
Giant Kelp - Algae
(Macrocystis integrifolia / pyrifera)
SF: 83.33% | DEN: 3.6
Spiny Lobster - Arthropods
(Panulirus interruptus)
SF: 83.33% | DEN: 2.4
California Sheephead - Wrasse
(Bodianus pulcher)
SF: 81.82% | DEN: 2.89
Senorita - Wrasse
(Oxyjulis californica)
SF: 81.82% | DEN: 3.33
Blacksmith - Damselfish
(Chromis punctipinnis)
SF: 72.73% | DEN: 3.63
Treefish - Scorpionfish
(Sebastes serriceps)
SF: 72.73% | DEN: 1.88
Blackeye Goby - Goby
(Rhinogobiops nicholsii)
SF: 63.64% | DEN: 2.57
Bluebanded Goby - Goby
(Lythrypnus dalli)
SF: 63.64% | DEN: 2.86
Kelp Bass - Sea Bass
(Paralabrax clathratus)
SF: 63.64% | DEN: 2.86
Rock Wrasse - Wrasse
(Halichoeres semicinctus)
SF: 63.64% | DEN: 2.57
Halfmoon - Sea Chub
(Medialuna californiensis)
SF: 54.55% | DEN: 2.5
Kelp Perch - Surfperch
(Brachyistius frenatus)
SF: 54.55% | DEN: 2.83
Kelp Rockfish - Scorpionfish
(Sebastes atrovirens)
SF: 54.55% | DEN: 3
California Golden Gorgonian - Cnidarians
(Muricea californica)
SF: 50% | DEN: 2.33
California Sea Cucumber - Echinoderms
(Parastichopus californicus)
SF: 50% | DEN: 2
Giant Keyhole Limpet - Mollusks
(Megathura crenulata)
SF: 50% | DEN: 1.67
Rock Scallop - Mollusks
(Crassadoma gigantea)
SF: 50% | DEN: 2
Spanish Shawl - Mollusks
(Flabellina iodinea)
SF: 50% | DEN: 2.33
Opaleye - Sea Chub
(Girella nigricans)
SF: 45.45% | DEN: 2.4
Painted Greenling - Greenling
(Oxylebius pictus)
SF: 45.45% | DEN: 2
Rubberlip Seaperch - Surfperch
(Rhacochilus toxotes)
SF: 45.45% | DEN: 1.8
Black Perch - Surfperch
(Embiotoca jacksoni)
SF: 36.36% | DEN: 2.75
Horn Shark - Bullhead Shark
(Heterodontus francisci)
SF: 36.36% | DEN: 1.5
Chestnut Cowry - Mollusks
(Cypraea spadicea)
SF: 33.33% | DEN: 2
Green Abalone - Mollusks
(Haliotis fulgens)
SF: 33.33% | DEN: 1.5
Kellet's Whelk - Mollusks
(Kelletia kelletii)
SF: 33.33% | DEN: 2
Red Gorgonian - Cnidarians
(Leptogorgia chilensis)
SF: 33.33% | DEN: 2
Wavy Turban Snail - Mollusks
(Lithopoma undosum)
SF: 33.33% | DEN: 3
Barred Sand Bass - Sea Bass
(Paralabrax nebulifer)
SF: 27.27% | DEN: 1.67
California Scorpionfish - Scorpionfish
(Scorpaena guttata)
SF: 27.27% | DEN: 2.33
Gopher Rockfish - Scorpionfish
(Sebastes carnatus)
SF: 27.27% | DEN: 2
Juvenile (YOY) Rockfish - Unidentified - Scorpionfish
(Sebastes sp. (YOY))
SF: 27.27% | DEN: 3
Pile Perch - Surfperch
(Rhacochilus vacca)
SF: 27.27% | DEN: 1.67
Black-and-Yellow Rockfish - Scorpionfish
(Sebastes chrysomelas)
SF: 18.18% | DEN: 1.5
Copper Rockfish - Scorpionfish
(Sebastes caurinus)
SF: 18.18% | DEN: 2
Lingcod - Greenling
(Ophiodon elongatus)
SF: 18.18% | DEN: 1
Olive Rockfish - Scorpionfish
(Sebastes serranoides)
SF: 18.18% | DEN: 1.5
Topsmelt - Silverside
(Atherinops affinis)
SF: 18.18% | DEN: 4
Zebra Goby - Goby
(Lythrypnus zebra)
SF: 18.18% | DEN: 2
Brown Gorgonian - Cnidarians
(Muricea fruticosa)
SF: 16.67% | DEN: 2
Christmas Tree Worm - Annelids
(Spirobranchus spinosus)
SF: 16.67% | DEN: 3
Giant Spined Star - Echinoderms
(Pisaster giganteus)
SF: 16.67% | DEN: 2
Leather Star - Echinoderms
(Dermasterias imbricata)
SF: 16.67% | DEN: 3
Opalescent Nudibranch - Mollusks
(Hermissenda crassicornis / opalescens)
SF: 16.67% | DEN: 2
Purple Urchin - Echinoderms
(Strongylocentrotus purpuratus)
SF: 16.67% | DEN: 2
Red Octopus - Mollusks
(Octopus rubescens)
SF: 16.67% | DEN: 1
Red Sea Hare - Mollusks
(Aplysia californica)
SF: 16.67% | DEN: 1
Red Turban Snail - Mollusks
(Lithopoma gibberosum)
SF: 16.67% | DEN: 3
Red Volcano Sponge - Poriferans
(Acamus erithacus)
SF: 16.67% | DEN: 3
Southern Sea Palm - Algae
(Eisenia arborea)
SF: 16.67% | DEN: 4
Strawberry Anemone - Cnidarians
(Corynactis californica)
SF: 16.67% | DEN: 0
Unidentified Abalone - Mollusks
(Haliotis sp.)
SF: 16.67% | DEN: 3
Warty Sea Cucumber - Echinoderms
(Parastichopus parvimensis)
SF: 16.67% | DEN: 1
Blue Rockfish - generic ID - Scorpionfish
(Sebastes mystinus/diaconus)
SF: 9.09% | DEN: 1
C-O Sole - Righteye Flounder
(Pleuronichthys coenosus)
SF: 9.09% | DEN: 2
Cabezon - Sculpin
(Scorpaenichthys marmoratus)
SF: 9.09% | DEN: 1
Giant Kelpfish - Clinid
(Heterostichus rostratus)
SF: 9.09% | DEN: 2
Giant Sea Bass - Wreckfish
(Stereolepis gigas)
SF: 9.09% | DEN: 1
Island Kelpfish - Labrisomids
(Alloclinus holderi)
SF: 9.09% | DEN: 1
Rainbow Seaperch - Surfperch
(Hypsurus caryi)
SF: 9.09% | DEN: 2
Sargo - Grunt
(Anisotremus davidsoni)
SF: 9.09% | DEN: 1
Speckled Sanddab - Lefteye Flounder
(Citharichthys stigmaeus)
SF: 9.09% | DEN: 2
Vermilion Rockfish - Scorpionfish
(Sebastes miniatus)
SF: 9.09% | DEN: 2