Fig. 1.

Specimens of Nerocila acuminata in fish from the Maracá-Jipioca Ecological Station, coastal region from the State of Amapá, northern Brazil. Male specimen attached to the pectoral fin of Amphiarius rugispinis (A), ‘acuminata form’, ovigerous female found in Anablepsanableps (B), ‘aster form’, non-ovigerous female found in Cathorops spixii (C), male specimen found in A. rugispinis (D), ‘acuminata-aster intermediate form’, ovigerous female found in Megalops atlanticus (E) and male found in Pseudauchenipterus nodosus (F)