At thousands of meters beneath the surface, where darkness, cold, and immense pressure reign, life thrives nonetheless. In 2019, a scientific expedition revealed the existence of three previously unknown species of snailfish. These species were identified during a dive conducted using the submersible Alvin at Station M in the Pacific Ocean, a zone that is one of the most documented areas of the deep sea. The bumpy snailfish, named Careproctus colliculi, was identified along with two other species: a dark snailfish, Careproctus yanceyi, and a smooth snailfish of the genus Paraliparis. The fact that two of these previously unknown species were collected during the same dive highlights the mysterious nature of marine deep-sea biodiversity, even in areas studied for decades. Snailfish belong to the family Liparidae, a group rich in more than 400 known species. Their particularity is occupying a wide variety of habitats, from simple tide pools to the deepest parts of the ocean. Despite this diversity, they share a recognizable silhouette, with a large head and a gelatinous body. The bumpy snailfish fascinates with its 22 pectoral fin rays, clearly visible on videos taken by robots from the Monterey Bay Aquarium Research Institute (MBARI). These rays are used for locomotion and also allow the animal to perceive its environment. Many fish are capable of "tasting" through these structures, and the newly described species seem to use their fins as true sensory organs. In a world where sunlight is absent, this ability constitutes a vital advantage. Among the three described species, the color differences stand out: pink for the bumpy snailfish, black for the other two. However, at thousands of meters depth, these chromatic variations lose all biological significance. As explained by biologist Mackenzie Gerringer, who led the study, these fish probably interact through other signals, such as water vibrations or dissolved chemicals. Some flashes of bioluminescence exist in these depths, but their exact role in the perception of these animals remains to be clarified. Studying these species helps understand how life adapts to extreme conditions. In the abysses, the temperature is freezing, the pressure exceeds hundreds of times what we experience at the surface, and food is scarce. Yet, snailfish thrive. Their gelatinous bodies, particular metabolism, and sensory abilities allow them to transform this hostile environment into a natural habitat. For Mackenzie Gerringer, a biology professor at SUNY Geneseo University, these discoveries are not only a scientific advancement. They represent a source of wonder and a call to protect the ecosystems of the deep sea. The study, published in the journal Ichthyology & Herpetology, reminds us that there is much to learn about the deep sea. Discovering three new species within such a well-studied area demonstrates that we have explored only a fraction of this world. For scientists, these snailfish are both a subject of study and a symbol: that of the resilience of life and the need to better understand before exploiting. The abysses are not only a disturbing or inhospitable setting. They are the home of organisms that challenge our knowledge and push the boundaries of biology. Each discovery, like that of these snailfish, brings us closer to an essential truth: our planet still holds countless mysteries, and it is our collective responsibility to preserve them.