The Doors of His Face, The Lamps of His Mouth
by Roger Zelazny
The story is set on Venus at a time when mankind has achieved routine travel to the various planets of the solar system. Unlike the actual planet, Zelazny's Venus is Earth-like, offering breathable air, water-filled oceans and native fauna, one of which is the fictional Ichthyform Leviosaurus Levianthus, a 300-foot-long denizen of the Venusian oceans commonly called "Ikky". It has never been caught, despite numerous attempts to do so.
The story's two main protagonists are Jean Luharich and Carlton Davits. Luharich is a successful businesswoman and media celebrity who is financing, and commanding, an expedition to capture an Ikky. Davits is a work-for-hire seaman who has been on the crew of several earlier attempts, and in fact had once been in Luharich's position: a playboy sportsman who commissioned the ship Luharich now owns, until he was injured in a disastrous try whose failure he blames himself for. Davits and Luharich were previously involved in a brief romantic relationship which ended years before the story begins.
Davits has been hired on as a "baitman"—the crewmember who is tasked with diving to the end of a submerged cable so as to attach and activate an electronic lure. Because the lure is deployed only when an Ikky has been detected in close proximity to the ship, the baitman can find himself dangerously close to the Ikky. This happens to Davits. He manages to safely return to the ship, where he assists Luharich in a successful capture.