Occurrence of Deep-sea shrimp, Hadropenaeus lucasii (Spence Bate, 1881) from the southwest coast of India.

The present study provides an integrative report combining morphological and molecular analysis of the deep sea shrimp species Hadropenaeus lucasii (Spence Bate, 1881) from the southwest coast of India. The present specimen was obtained from the depths of 200-300m from the commercial bottom trawlers operated off Sakthikulangara fishing harbour off Kollam, Kerala. A phylogenetic analysis was used to explore the relationships of the genus. DNA barcoding and phylogenetic analysis were used to explore the relationship of the genus Hadropenaeus based on mitochondrial gene (16S: OK571387, OK571388; COI: OK569849, OK569850) sequences of the present specimen with the sequences retrieved from NCBI GenBank revealed an interspecies genetic divergence of 0.0% to 0.6%.

DNA barcoding of deep-sea shrimp Sicyonia parajaponica Crosnier, 2003 (Crustacea: Decapoda: Sicyoniidae) from southwest coast of India.

The present work reports detailed taxonomic information on deep-sea shrimp Sicyonia parajaponica from southwest Indian waters. The samples were caught in bottom trawls conducted between the depths of 200 and 230 m from Sakthikulangara fishing harbour off Kollam, Kerala along the Arabian Sea during November 2019. DNA barcoding and a phylogenetic analysis was used to explore the relationship of the genus Sicyonia based on mitochondrial cytochrome c oxidase subunit 1 (COI: MN816389, MN816390) with the present specimen and sequences retrieved from NCBI GenBank. There is no difference in the intraspecies genetic distance (0%) while interspecies genetic distance (19.028.1%) revealed divergence between the species (COI) of the genus Sicyonia.