Saltwater fish live in a hypertonic solution, which is seawater. The salt concentration in seawater is higher than in the fish’s body. To survive, these fish drink large amounts of seawater and actively get rid of excess salt. This process helps them balance fluids and prevent dehydration in their marine ecosystem.
In saltwater fish, this means that water tends to leave their bodies. As a result, these fish lose water and face dehydration. To counteract this, saltwater fish actively drink seawater. They also excrete excess salt through specialized cells in their gills and kidneys. This ability to regulate their internal environment is crucial for their survival in a saline habitat.
Understanding how saltwater fish adapt to their surroundings sheds light on their ecological roles and adaptations. The next part will explore the various types of saltwater fish found in different ocean habitats and how their unique adaptations enable them to thrive in diverse marine environments.
