Crossword puzzle clue "tuna or carp"

to find fault incessantly

to try to catch cold-blooded aquatic vertebrates

(Scots) expressing regret or impatience, also OCH

to clean a ship's bottom by burning off seaweed

one who takes or holds a captive

to raise trivial and frivolous objections

a species of freshwater fish of the Cyprinidae or Carp family, aka cheven