Botryllus primigenus Oka, 1928
Botryllus horridus Saito and Okuyama, 2003
Botryllus scalaris Saito and Mukai, 1981
Botryllus puniceus Saito and Nagasawa, 2003
Botryllus sexiens Saito and Watanabe, 1981
Botryllus delicatus Okuyama and Saito, 2001
Botryllus schlosseri Pallas, 1766
Botryllus promiscuus Okuyama and Saito, 2002
Botrylloides simodensis Saito and Watanabe, 1981
Botrylloides praelongus Atsumi and Saito, 2011
Botrylloides lentus Saito and Watanabe, 1985
Botrylloides fuscus Saito and Watanabe, 1985
Botrylloides lenis Saito and Watanabe, 1985
Botrylloides violaceus Oka, 1927

Species collected around Izu Peninsula and Izu Islands