https://pmc.ncbi.nlm.nih.gov/articles/PMC5750012/
Distribution, composition and functions of gelatinous tissues in deep-sea fishes - PMC
Many deep-sea fishes have a gelatinous layer, or subdermal extracellular matrix, below the skin or around the spine. We document the distribution of gelatinous...
deep sea fishes
https://wellcomecollection.org/works/ygzm6w7w
A variety of deep-sea fishes, some skeletal, including the deep-sea eel. Line block after a wood...
A variety of deep-sea fishes, some skeletal, including the deep-sea eel. Line block after a wood engraving by J. G. Flegel after R. Koch.