Feeding habits of Isarachnanthus nocturnus and Pachycerianthus magnus: morphological and metagenomic analysis of stomach contents (Cnidaria; Anthozoa; Ceriantharia)

The phylum Cnidaria is composed of animals that have great relevance in the maintenance of aquatic ecosystems. One of the groups that comprise the phylum is the subclass Ceriantharia, represented by members generally known as ceriantharians or tube-dwelling anemones. Although the phylum presents several studies related to the ecological processes of the food network, the knowledge about these processes in ceriantharians is non-existent. As the subclass has some particularities in relation to the other phylum members, the results obtained in these previous studies may not correspond to those present by these animals. Thereby, this study aims to make a bibliographic review on papers published in the class Anthozoa with the feeding theme and identify parameters never observed on the feeding habits in two species of Ceriantharia, from São Sebastião (Alcatrazes) (BR) and Okinawa (JP). The main classes of animals that compose the diet of this ceriantharians are described by morphological and metagenomic analysis of the stomach contents. (AU)