The Enterprise recovered a shuttle from a larger Xindi-Insectoid vessel in January 2154 in the episode "Hatchery". This vessel was later used to infiltrate the detection grid found around Azati Prime and take scans of the Xindi superweapon. Jonathan Archer later used the shuttle carrying several photonic torpedoes to attempt to destroy the superweapon.
The Xindi-Reptilian starship is a fictional starship of Xindi-Reptilian origin and is smaller in size than the Enterprise. Two of these ships proved to be an equal match to that of the Enterprise; however, it should be noted that the ships were built primarily for combat.
The starship was equipped with energy weapons and deflector shielding. Degra, a Xindi-Primate, had worked on this type of vessel during its creation, providing him with crucial information that enabled him to destroy this type of ship with his much smaller ship.
The Xindi-Aquatic cruiser is a fictional starship, the ship is of Xindi-Aquatic origin and is much larger in size than the Enterprise, dwarfing it by several magnitudes. The Enterprise was capable of fitting in the Aquatics "shuttlebay". The Aquatic ships themselves are much more powerful than their counterpart subspecies but travel at much slower speeds.
The ships themselves are primarily filled completely with water. They do however possess at least one oxygenated, dry room which has been used for communication with the Aquatic crew. The Aquatic ships utilize directed energy weapons as their primary offensive weapon.