Examining asphalt volcanoes' natural communities
Asphalt volcanoes and other extensive hard tar seafloor accumulations are known from the Gulf of Mexico, off Angola, and in the Santa Barbara Channel , southern California. There are two major volcano features in the SBC: Il Duomo and Il Duomito . While the geology of these features has been well studied, their fish assemblages have not been well documented. Using an autonomous underwater vehicle, we surveyed the fishes that live on the volcanoes and on the surrounding mud.
The most abundant primarily asphalt-associated species were greenblotched, swordspine, greenspotted, and flag rockfishes, and bocaccio, cowcod, and bank rockfish. The most abundant mud-associated species included Pacific sanddab, slender, Dover, and English soles, and unidentified poachers. A few taxa were found both on the mud and over the edges of the asphalt.
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