Well, there's 'Deep Silence' by Graham Masterton. It involves some really spooky happenings in the deep sea. The isolation and the strange creatures or forces in the deep sea are elements that are also found in 'Mega a novel of deep terror sea horror novels'. And then there's 'The Raft' by Stephen King, a short story that has that sense of being trapped in a small space in the middle of a vast and dangerous ocean.
One similar novel could be 'The Terror' by Dan Simmons. It's set in the Arctic but has that same sense of dread and horror at the mercy of the elements and unknown terrors. Another might be 'Jaws' by Peter Benchley, which is centered around a man - eating shark in the sea, creating intense horror.
Some people might consider 'Leviathan Wakes' by James S.A. Corey to be somewhat related in terms of the sense of danger in space which can be paralleled to the deep sea in 'Mega a novel of deep terror sea horror novels'. It has a lot of mystery and horror elements as the characters face unknown threats in the vastness. Also, 'Sphere' by Michael Crichton is about a strange object in the ocean that causes all kinds of mind - bending and terrifying events.
Chapter 538, "You Won't Get Angry No Matter What I Ask, Right?", is the clearest early answer because it turns Su Yinwan's situation into a concrete plot event. The chapter gives readers a real answer by opening on Su Yinwan couldn't ignore Jiang Cheng's unusual behavior any longer...
Chapter 437, "A Gentleman's Revenge is Not Too Late Even After Ten Years!", is the clearest early answer because it turns Sister Li's situation into a concrete plot event. It opens with [What's happening, why did a group of people suddenly show up and...
Chapter 395, "She's Not Trying to Use Under-the-Table Tactics, Is She?", is the clearest early answer because it turns Zhang Cheng's situation into a concrete plot event. It opens with He had thought that Jiang Li wanted the lead role to control the...
Chapter 518, "Calculator: 438", is the clearest early answer because it turns Zhao Lang's situation into a concrete plot event. Early on, I won't eliminate you." Jiang Li's statement came as a shock.. By the end, Meanwhile, unbeknownst to anyone, he had already quietly eliminated....
Chapter 718, "This Person Is No Longer the Same Person", is the clearest early answer because it turns Mystical Skills's situation into a concrete plot event. It opens with Changqing noticed her amazed gaze and his eyes also shifted to the...
Chapter 406, "Barely Considered Living", is the clearest early answer because it turns Living Yama's situation into a concrete plot event. The chapter gives readers a real answer by opening on With the help of government officials, Jiang Li and Jiang Yan quickly...
Chapter 525, "Help It Transcend", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event. The chapter turns that into something concrete by moving from The forest at night was still quite damp and cold.
Chapter 389, "Slaughter Pig Platter", is the clearest early answer because it turns Xu Huiqiu's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Jiang Li gave Xu Huiqiu a meaningful look and finally voiced the...
Chapter 357, "Have Jiang Li and Jiang Yan Fallen Out?!", is the clearest early answer because it turns Wen Jiaojiao's situation into a concrete plot event. Early on, As time slowly passed, watching the gradually moving clock on the....
Chapter 757, "Don't come begging us then!", is the clearest early answer because it turns Lin Manru's situation into a concrete plot event. The chapter turns that into something concrete by moving from Old Man Cheng's guess was spot-on.