Laterolateral horizontal projection of the goldfish (Carassius auratus, Linnaeus 1758) just before (a) and after (b) puncture of the posterior camera. 

Morphology and location of the coelomic organs of a goldfish (Carassius auratus, Linnaeus 1758) after incision (SB – swim bladder; FB – fat bodies; St, stomach) 

In A swim bladder torsion, the point (arrow) where the torsion happened, and in B a normal swim bladder (anterior chamber -AC, posterior chamber -PC, communicating duct -CD and pneumatic duct -PD). On the left a schematic representation of the torsion (A) and normal swim bladder (B). 

Anterior chamber presented a single layer of flattened epithelial cells, with a prominent basal lamina below the epithelial cells and lamina propria containing collagen fibrils, elastic fibres, and fibroblasts. In B section in the point where the torsion occurred. Many cells were degraded due to the rapid decomposition of the corpse (H&E, 40x).