Abstract
Abstract Occurrence of deep-water corals on the Mid-Atlantic Ridge between the southern part of the Reykjanes Ridge and the Azores has been examined based on video surveys using remotely operated vehicles (ROV) and bycatch from longline and bottom trawl. Eight sites were surveyed with ROVs, and the bycatch material came from 16 trawl hauls and nine longline sets. Corals were observed at all sites surveyed with ROVs at depths between 800 and 2400 m, but most commonly shallower than 1400 m. The species richness of corals was high, with a total of 40 taxa recorded. Octocorals dominated the coral fauna with 27 taxa. Lophelia pertusa was one of the most frequently observed corals, present at five of the eight surveyed sites. It occurred on basaltic outcrops on the seamounts but always as relatively small colonies (
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