His average dive time is four hours, a marathon in scuba terms, though he has been underwater for as long as six. Cobb dives for nudibranchs, he says, because it’s the “greatest value for ...

The Scuba Fifty Fathoms comes in various colors, each drawing inspiration from a different species of nudibranch sea slug. The corresponding slug also appears on the caseback of each watch.

Nudibranchs inhabit the oceans and are known ... Elsewhere, the latest Scuba Fifty Fathoms sticks to the formula we know. The 42.3mm case, unidirectional rotating bezel and glowing Super-LumiNova ...