(Pearl fishery | Plunge) If one sees himself diving into the ocean for pearls in a dream, it indicates his attachment to worldly treasures. If one sees himself diving into the waters and finds out that he could get nothing out of it except mud in his dream, it means distress caused by someone in authority. If one brings a pearl out of the water in a dream, it means marriage or acquiring knowledge or discovering a treasure. If one dives into a river and finds it difficult to come out of the waters in the dream, it means that he will suffer from burdens he cannot carry, or bear patience with adversities. Diving into the ocean to extract pearls from oysters in a dream also means seeking knowledge or wealth. (Also see Pearl diver)
Dream dictionary: diving into river dream meanings
…Diving easily without fatigue portends that we will achieve both economic and loving success. If we suffocate, it tells us that our ambitions will vanish. If we save someone from drowning it means that we will avoid a dangerous passion for us. If we’re learning to dive, we doubt our will. Diving in clear water means that we are clear and noble. Swimming in shady water means passion with evil thoughts. If we’re diving and the sea or river infuriates and becomes stormy, then it shows that our passions are stronger than our will….