👉 The term "hydrophinae" is a genus of marine invertebrates that are characterized by their lack of cell walls. These invertebrates have a tough, gelatinous exoskeleton made up of a combination of protein and cellulose fibers. This exoskeleton allows them to absorb water from the ocean floor without dehydrating. The hydrophinae belong to the family Hydrophilidae, which also includes other marine animals like sea cucumbers, sea stars,
