Dark Water Operative

{{CardTable }}
 * creator  = RespectBlindfolds
 * kanji    = {{Ruby|暗|あん}}{{Ruby|黒|こく}}{{Ruby|海|うみ}}の{{Ruby|工|こう}}{Ruby|作|さく}}{{Ruby|員|いん}}
 * phon     = Ankoku umi no kōsaku-in
 * trans    = Dark Ocean Operative
 * attribute = DARK
 * level    = 4
 * type     = Fish
 * type2    = Effect
 * atk      = 1000
 * def      = 1500
 * lore     = If you control no monsters, or your opponent controls a LIGHT monster: You can Special Summon this card from your hand. (Quick Effect): You can Tribute this face-up card; Special Summon 1 Level 7 Sea Serpent monster from your hand, Deck, or GY. You can only activate each effect of "Dark Water Operative" once per turn.
 * sets     = GOTD-EN021 Glory of the Duelist
 * rarity   = Common