Silfra Fissure · Silfra Fissure
7 species, most likely first·How chances work
RedwingLeast Concern
Almost always
Nearly every dive
Greylag GooseLeast Concern
Likely
About half of dives
Harlequin DuckLeast Concern
Red-Throated LoonLeast Concern
Arctic charLeast Concern
Sometimes
About 1 in 3 dives
Marimo algae
Expected
Known here, not yet in recent logs
Three-spined sticklebackLeast Concern
What the labels mean
