In those intertwined moments of blood-rushing uncertainty, hope flourished as the leviathans slowly shifted their attention, captivated by the radiant rhythm propelled from Victor's essence. His heart melded with the symphony that carried them beyond terror and into the realm of possibility. The larger beings who once struck fear now unfurled the potential for cooperation—an unwritten narrative blossoming around them like coral rising from the silt.

Glimmers of lucidity illuminated the darkness surrounding their submersible as Victor poured himself into the melody, manifesting the powerful vibrations within their pooling energies. The aquatic guardians brushed against the leviathans' silhouettes, guiding them towards layers of peace and unity. In that interconnected network of frequencies pulsating through the abyss, a wave surged forward, igniting shimmering connections linking the leviathans, nurturing reconciliation as they began to harmonize.

He met Tamar's panicked gaze, and amidst fear lay a glimmer of realization as she hesitated to deepen the controls. "We're not running away?" she whispered, incredulous, cherishing disbelief.

Overhead, the leviathans now shared glances, fierce yet softened by the warming signals exchanged. Victor caught glimpses of recognition, a turning therein; beneath the depths of animosity stirred the currents of a growing understanding. An unspoken pact loomed delicately around them—a chance to share knowledge and power, finding footing in the twilight realm.

In an uproar of flood, a deep, sonorous cry resonated across the ocean's breadth. It echoed the newfound understanding as if to herald a declaration of unity amidst their meeting. Victor's heart swelled, hope undulating within him; such reverberations could weave realities once thought impossible. The leviathans were no longer formidable threats; they were cornerstones of coexistence.

When Selene collected and translated the waves of emergent frequencies, certain patterns evolved—compassion, guardianship, and kinship, intertwined and enchanting. Ecosystem bonds tethered the leviathans and aquatic beings alike, birthing essence mingled through consciousness.

Victor drove his explanations forth, and the leviathans inclined towards the guidance of aquatic guardians, witnessing threads weaving narratives through their magnificence. They mirrored the invitation to sift from instincts into harmony—a poignant potential bursting forth against the threats of extinction.

As if orchestrating a symphony that elevated above mundane fears, he transitioned, enfolding Tamar into the fabric of uncertainty and trust. "Listen," he urged, consuming each moment with tenderness, "music can reshape destinies. Can you feel it? Together, we can bring forth a new existence, a tapestry of bonds that transcend our roots!"

Those vulnerable seconds interlaced visceral recollections of wondrous galaxies, delivered through enlightenment and respect. They hovered amid the starlit wonder, aching for the connection that birthed within them. Those leviathans pulsed, responding to the threads of collaboration, adding their voices to this newfound narrative, intertwining with the aquatic beings' mirrored dance.

Much like celestial bodies converging into grand constellations—life and starstuff harnessing back to the heart of what bonded existence across galaxies—Victor began to feel it too.