is unique within the Amblyopinae
in having the following combination of characters: 1) typically four, rarely three, anal-fin pterygiophores anterior to the first hemal spine; 2) pelvic fins small, united, and funnel-shaped with a well-developed interradial membrane; and 3) abdomen scaled. Trypauchen
comprises two species: T. pelaeos, known from Myanmar, Malaysia, Thailand, Vietnam, and China; and T. vagina
, distributed from Israel, Kuwait, along the coasts of India, ranging eastward to the Philippines, Taiwan, and China.