Immunohistochemistry of the Gut-Associated Lymphoid Tissue (GALT) in African Bonytongue ( Cuvier 1829).

is a basal teleost, belonging to the Osteoglossidae family, which is widespread in many parts of Africa. The digestive tract of presents similar characteristics to those of higher vertebrates, exhibiting a gizzard-like stomach and lymphoid aggregates in the intestinal lamina propria. The adaptive immune system of teleost fish is linked with each of their mucosal body surfaces.

Gill structure and neurochemical markers in the African bonytongue (Heterotis niloticus): A preliminary study.

We have conducted a morphological and immunohistochemical study of the gills of juvenile specimens of the obligate air-breathing fish Heterotis niloticus. The study has been performed under normoxic and hypoxic conditions. The gills showed a reduced respiratory surface area by development of an interlamellar cellular mass (ILCM).