•Eight species of scaled polychaetes are reported from hydrothermal vents of the Guaymas Basin in the Gulf of California; Neoleanira racemosa in the Sigalionidae and seven species of Polynoidae, including two new species, Bathykurila guaymasensis, in Macellicephalinae, and Macellicephaloides alvini, in Macellicephaloidinae. The latter genus and subfamily are reviewed, and a Key to the seven spe...

Polychaetes (such as Sternaspis sculata) can biotransform polycyclic aromatic hydrocarbons (PAHs) in the environment, and cytochrome P450 (CYP) enzyme is key substance this process. Here, a novel CYP gene was identified from S. sculata, marine polychaete that abundantly distributed along coasts worldwide. The full-length cDNA of new 1829 bp, encoding protein 509 amino acids. deduced acid sequen...

In 2015, we studied the macrozoobenthic community composition along a dissolved oxygen gradient in deep trough of Gulf St. Lawrence (Canada). We sampled seabed at nine stations using box corers (three replicates per station), starting outer and ending Lower River Estuary. found four different communities dominated by polychaetes, crustaceans, molluscs, with emphasis shifting from mollusc to pol...