Selachian

Fig. 4-10 shows crude apparatus which was used to make rough measurements of the vertical forces produced by selachian tails.

Telling selachian sharks apart from batoid skates and rays is relatively easy (with some exceptions noted below), but telling skates (rajiforms) apart from rays (myliobatiforms) can be more challenging.

These two tours had whetted the colonies' appetite for Royal visits, and by the turn of the century that appetite was positively selachian.

Leary frowned and then smiled his selachian smile.

However, some selachians enter freshwater and a few, like the stingray Paratrygon motoro, are even restricted to freshwater.