Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
squāmĭger, gĕra, gĕrum, adj. [squamagero], scale-bearing, scaly (poet. and in postAug. prose): pisces, Cic. Arat. 328 (574): cervices (anguis), Ov. M. 4, 717.
Subst.: squāmĭgĕri, ōrum, m., fishes, Lucr. 1, 162; 1, 370 sq.; 2, 343; 2, 1083; Plin. 11, 37, 50, § 137.