Flatfish (Pleuronectiformes) encompass fascinating fish species known for their high gastronomical value, rearing performances, and market prices, which attract both economic and scientific interest. Despite these attributes, flatfish exhibit unique morphological, developmental, and biological features, as well as distinctive swimming movements, which require special approaches in skeletal biology research, an area that remain...

Skeletal deformities in farmed fish are a recurrent problem. External malformations are easily recognized, but there is little information on how external malformations relate to malformations of the axial skeleton: the external phenotype–skeleton link. Here, this link is studied in post‐hatch to first‐feed life stages of Chinook salmon ( Oncorhynchus tshawytscha ) raised at 4, 8 and 12°C. Specimens were whole‐mount‐stained fo...

A new type of vertebral malformation is described, consisting of deformed cartilaginous neural and haemal processes and the compression and fusion of vertebral bodies. The malformation is designated as haemal vertebral compression and fusion (haemal VCF ). We studied the aetiology of the malformations and described microanatomical histopathological alterations. The malformations were detected during routine quality control in...

Poly‐and monoclonal antibodies, raised against mammalian membrane‐bound proton pump (V‐ATPase) were applied to the bone‐resorbing cells of Oreochromis niloticus to clarify if osteoclasts of an advanced teleost species display V‐ATPase, a key enzyme in the process of bone resorption. All antibodies labelled cells at known sites of bone resorption, the endosteal bone surfaces surrounding the tooth anlagen. The best results were...