enhanced strength, speed, agility, endurance, and reflexes, accelerated vision, breathes underwater, can manipulate any body of water she comes into contact with, sonar sense, limited metamorphesis, secrete blinding skin oils
In-house associate with her husband Namor beginning in Avengers (1st series) #285.
Marrina was believed killed in Avengers (1st series) #293, but Avengers (3rd series) #47 revealed her to be alive in the Master's lab. She was mutated into a mindless weapon by Norman Osborn in Dark Reign: The List - X-Men, and killed by her former husband Namor. Marrina was restored to life in Chaos War #5.