|Seats up to:||4 crew|
|Max Speed:||104 km/h, 76 km/h|
|Affiliation||XIG (Expanded Interceptive Guardians)|
Siren 7500 (セイレーン7500 Sairan 7500) is a submarine used Team Marlin. Equipped with blast guns and engines with water propulsion. Can being autopiloted by PAL. Appeared in Episode 21 and OVA Once Again Gaia.