What Is The Main Theme Of The Shell Seekers?

In the quiet woods, under the stars, Elara and Kaelen share a special, intimate moment. It feels forbidden because everyone has always told them they shouldn’t be together but it also feels right. Elara was raised to fear the dark, and Kaelen is made of shadow itself. But in each other’s arms, they start to see the truth: light and shadow aren’t enemies they belong together. For 400 years, the land of Luminara has lived by that lie. A powerful group called the Order rules everyone, using fear to make people obey. No one asks why winters are getting longer, why food is getting harder to grow, or why the moon is slowly losing its light. Elara never thought she would change anything. She’s just a normal girl, and all she has left of her mother who disappeared years ago is an old brass locket. But one day, the locket starts to hum with strange power. Then a man made of dark mist and starlight steps out of the trees. His name is Kaelen. He is the guardian the Order has hunted for hundreds of years, calling him a monster. But he tells Elara the secret no one is allowed to say: Light can’t live without shadow. If you separate them, the whole world will die. Now Elara is on the run. Valerius, the cruel leader of the Order, is chasing her he wants to steal the locket’s power so he can rule forever. She is also followed by Morgrath, a twisted shadow who offers her something scary: total power, no more fear, no more running if she lets the darkness take over. And deep under the mountains, something very old and powerful is waking up. It could fix everything… or destroy it all.

Fairytales don’t always come from the earth... until her. 
 Mermaid legends are human fables, but beneath the waves, war is looming. A missing daughter is the only hope for a dying species. 
 Rescued during a typhoon, Galene finds herself in a new world amongst a dangerous species—humans. With no memories of her watery pasts, she doesn’t see the predators closing in until it’s too late.
 Stralath is a shape-shifting bounty hunter dedicated to keeping the peace in a violent universe. His earthly mission? To find the elusive mermaid who he’ll dangle in front of a dangerous oceanic pod.  Except Galene is not what he expected—she’s an innocent caught in a dangerous game of extinction. An angel who paints with color and smiles at the world.  She is easy prey, and Stralath abandons his mission, unleashing his brutal self to guard her heart and life. 

She was lost, nowhere to be found. So, he began to find her. Little did he know she was just there all along hiding beneath the sea.(This story involves Philippine Mythology, but I altered some things for the plot to work out, thanks!)

Morgan is just trying to survive her cousin’s destination wedding in Bermuda. She didn’t come prepared for emotional damage, and she certainly didn't expect the biggest drama of the weekend to involve a head injury, a blocked tunnel, and a very confusing run-in with three dudes dressed like they raided a Pirates of the Caribbean casting call. Turns out they’re not LARPing. They aren't actors. It's not a fun sunset cruise. No. They’re privateers. Like, real ones. From the actual year 1725. And Morgan? She’s stuck. She may have a pretty good handle on how to survive in the wilderness, thanks to her ex-Green Beret dad. But eighteenth-century ships, sexist crewmates, and suspicious captains aren’t exactly her area of expertise. Especially not Flynn, the broody, grumpy, maddeningly handsome Captain who might rather toss her overboard than deal with whatever disaster she’s brought onto his ship. But as danger closes in, from rival ships to secrets Morgan didn’t mean to bring with her, she’ll have to find her place in this brutal new world. That is… if she doesn’t drive Flynn to keelhauling her first. Or fall for him. Maybe both. Adventure, slow-burn tension, and fish-out-of-water chaos collide in this swoony, high-stakes romantic tale across time. For fans of enemies-to-lovers, pirate drama, and heroines who don’t know when to shut the fuck up.

Charlie is a member of Black Diamonds, they hunt for these inhuman beings called mermaid. When the ship is attack one night, Charlie is pulled into a whole new world under the sea.

Three siblings are sent away to visit their estranged wealthy relatives, the Apions, in picturesque WavesPort. But the town is not as idyllic as it seems. A mystery that the town has buried, three siblings unearth. Avid curiosity that leads them on a perilous journey. A journey of uncovering the truth. And what they find is beyond unfathomable.