Given the extraordinary axial morphology and movements of hagfishes, the probable but unresolved functional link between fish integument and locomotion, and the overall paucity of data, the skins of myxinid fishes make a fascinating and convenient system for investigating morphological and mechanical characteristics associated with whole-body knotting movements.
In this study, we gathered data sets from uniaxial tensile testing on myxinid skins that were strained in longitudinal and circumferential body axes to assess fundamental material properties (tensile strength and stiffness along longitudinal and circumferential axes).
The present study represents a first approximation of the mechanics of myxinid integument, in which we subjected all fabricated skin samples from all study species to quasistatic, uniaxial tensile tests to failure.
So far, however, submarine investigations of hydrothermal vents have not captured any myxinids from these unique environments (Biscoito et al.
2004) to the East Pacific Rise in 2004, at least seven specimens of myxinids were observed and filmed on the vent sites Grommit (21[degrees]33.