Histochemical and ultrastructural characterization of the gills in tiger shark, Galeocerdo cuvier (Péron & Lesueur, 1822): Structural strategies for functional adaptation. - Madkour FA; Mohammed ESI; Al-Rasheed M; El-Nahass EE; Elwan MM; Ashour M; Mathew RT; Abdelhakeem F (Tissue & cell, 2026)