bob, maneuver, kick, snake, dive, descend, swim, surface, flip, decompress, plunge, spit, hyperventilate, ascend, gear up, scuba dive, snorkel, spelunk, clear (face mask/snorkel), lower oneself, defog (one's mask), hold one's breath, blow out, suck (air), skin-dive, recharge, charge (an air tank)

heave, tack, rig, cast, wade, catch, bait, trap, gut, tie, untangle, reel in, troll, net, hook, fish, trawl (a net in through the water), spear, spearfish, snare (fish in a line), fly-fish, remove (a hook from a fish), gill, clean (fish), cut (the line), release (fish), throw out (one's line), throw back, pull on (the line), land (a catch)

stroke, sweep, catch, release, recover, catch a crab, set the boat, portage, row, skull, cox, cross (the finish line)

tow, snap, wipe out, free-fall, surf, suit up, shoot down (the face of a wave), ride (a wave), paddle (a board)

propel, drag, stroke, position, rotate, kick, dive, float, dunk, swim, crawl, splash, jump into, breathe, streamline, reach, extend, relay, drown, tread (water), push off, paddle, flutter kick, roll (head to the side to breathe), flipturn, maintain (momentum), bellyflop, dog paddle, immerse oneself (in a pool), plunge (into the cove), grab (the start block), drill dig into, over-rotate, scissor-kick