Below is the list of invertebrates and algae species that are monitored as part of REEF's Volunteer Fish Survey Project in the Eastern Atlantic and Mediterranean. For most species, the count data is: Single (1), Few (2-10), Many (11-100), Abundant (>100). For some species, a simple Presence / Absence count is used. (they are noted below)

Original List of Species Monitored Since 2015

  • Giant Barnacle, Megabalanus azoricus
  • Red Hermit Crab, Dardanus calidus
  • Atlantic Spiny Spider Crab, Maja brachydactyla
  • European Spiny Lobster, Palinurus elephas
  • Narval Shrimp, Plesionika narval
  • Mediterranean Slipper Lobster, Scyllarides latus
  • Bearded Fire Worm, Hermodice carunculata
  • Spiral Tube Worm, Sabella spallanzanii
  • Berried Anemone, Alicia mirabilis
  • Jewel Anemone, Corynactis viridis
  • Black Coral, Antipathella wollastoni
  • Yellow Encrusting Anemone, Parazoanthus sp.
  • Purple-striped Jelly, Pelagia noctiluca
  • Moon Jelly, Aurelia aurita
  • Black Sea Urchin, Arbacia lixula
  • Irregular Sea Star, Coscinasterias tenuispina
  • Spiny Sea Star, Marthasterias glacialis
  • Long-spine Sea Urchin, Centrostephanus longispinus
  • Cotton-spinner Sea Cucumber, Holothuria sanctori
  • Tubular Sea Cucumber, Holothuria mammata
  • Red Sea Star, Ophidiaster ophidianus
  • Rock Sea Urchin, Paracentrotus lividus
  • Purple Sea Urchin, Sphaerechinus granularis
  • Black Sea Hare, Aplysia fasciata
  • Edmund's Nudibranch, Felimida edumunsi
  • Mid-Atlantic Nudibranch, Felimare midatlantica
  • Variable Azores Nudibranch, Felimare picta azorica
  • Dotted Sea Slug, Peltodoris atromaculata
  • Azorean Aeolid, Caloria elegans
  • Common Octopus, Octopus vulgaris
  • Rough Pen Shell, Pinna rudis
  • Polycerid Nudibranch, Tambja ceutae
  • Triton Snail, Charonia lampas
  • Transparent Tunicate, Clavelina lepadiformis
  • Button Tunicate, Distaplia corolla
  • Encrusting Myxilla Sponge spp., Myxilla rosacea/Myxilla macrosigma
  • Volcano Sponge, Tedania anhelans
  • Supreme Limu, Asparagopsis taxiformis
  • Harpoon Weed, Asparagopsis armata
  • Caulerpa, Caulerpa webbiana
  • Macaronesia Codium, Codium elisabethiae
  • Rough Coralline Algae, Coralina elongata
  • Peacock's Tail, Padina pavonica
  • Thorn Algae, Cystoseira abies-marina