1 Introduction
Corbicula fluminea belongs to the family Corbiculidae, genusCorbicula (Ishibashi et al., 2003; Korniushin, 2004). The clam
has a round base and triangular double shells (Figure 1). The surface of
the shells is glossy, and the shell color varies with the living
environment (Alyakrinskaya, 2005). Shells are brown, yellow, green, or
black and are characterized by circular growth lines (Qiu, Shi, &
Komaru, 2001). There are three main teeth in the left shell, one in the
front, one in the back and one in the side (Thorp & James, 1991). The
clam grows rapidly and takes only 73–91 days for sexual maturation
(Tao, Deng, & Li, 2016; Gu, & Wang, 2001). Due to this, it has strong
reproductive capacity and diffusion ability (Sun, 1995). C.
fluminea is native to East Asia, therefore it is also called the Asian
Clam. This species is a native shellfish in China, where it displays
strong environmental adaptability. As a representative of freshwater
macrobenthic invertebrates, clams are an important component of
freshwater ecosystems, and this species has an important impact on the
diversity of freshwater ecosystems (Ding, Deng, & Cao, 2014; Xiao,
2015). As a bivalve that has successfully undergone radiation in
freshwater habitats (Sirirat, Joong, & Foighil, 2000), the clam is
widely distributed in lakes and rivers in China. It is also found in
Korea, Japan, and Southeast Asian countries (Jiang, & Zhao, 1997),
whereas in America and Europe, it is considered as an alien species
(Keogh, & Simons, 2019; Kondakov, Palatov, & Bolotov, 2018).