XENISTHMIDAE

* Gymnoxenisthmus tigrellus Gill, Bogorodsky & Mal 2014

Gulf of Suez: ¯

Gulf of Aqaba: ¯

Red Sea main basin: Saudi Arabia (Gill et al. 2014).

General distribution: Red Sea endemic.

Xenisthmus balius Gill & Randall 1994

Gulf of Suez: Egypt (Gill et al. 2017).

Gulf of Aqaba: Egypt (Gill et al. 2017).

Red Sea main basin: Eritrea (Gill et al. 2017), Saudi Arabia (Gill et al. 2017).

General distribution: Red Sea, northwestern Indian Ocean: Gulf of Oman and Persian Gulf.

* Xenisthmus oligoporus Gill, Bogorodsky & Mal 2017

Gulf of Suez: ¯

Gulf of Aqaba: ¯

Red Sea main basin: Saudi Arabia (Gill et al. 2017).

General distribution: Red Sea endemic.

Xenisthmus polyzonatus (Klunzinger 1871)

Gulf of Suez: ¯

Gulf of Aqaba: Egypt (Gill et al. 2017).

Red Sea main basin: Egypt (Klunzinger 1871, as Eleotris polyzonatus), Eritrea (Gill et al. 2017), Saudi Arabia (Gill et al. 2017).

General distribution: Red Sea, Indo-West Pacific: Maldives east to Northern Marianas, Tonga, Samoa and Marquesas Islands.