perisarc
/ˈpɛrɪsɑːrk/
noun
- The outer protective layer or covering of certain colonial marine animals, such as hydroids.
- Under the microscope, the perisarc appeared as a transparent, tube-like structure.
- The perisarc of the hydroid colony provides support and protection for the individual polyps.
- Marine biologists collected samples to study the composition of the perisarc in different species.