They include Matsya, the fish, Kurma, the tortoise, Varaha, the boar, and Narasimha, the Man-Lion.
The first four of these have appeared in the Satya Yuga, which is the first of the four epochs of the current Mahayuga. They include Matsya, the fish, Kurma, the tortoise, Varaha, the boar, and Narasimha, the Man-Lion. The next three will appear in the Treta Yuga, the eighth in the Dwapar Yuga, and the last two will appear in the Kali Yuga. FTP, Vamana, Parashurama, Rama, Balarama, Kalki and Krishna are all what representations of the Preserver of the Hindu Trinity?
The first four of these have appeared in the Satya Yuga, which is the first of the four epochs of the current Mahayuga.
the Ten Avatars of {Vishnu} (or {Dasavatara}, accept equilvalents)