Grantia
Grantia is in the porifera phylum and is the genus for Calcareous Sponges. However, the Calcareous Sponges do not have an endocrine system or circulatory system. To make up for the lack of the endocrine system, the calcareous sponges send hormones from cell to cell to ensure that they survive. Calcareous sponges do not move unless they are moved by waves in the ocean.
Grantia is in the porifera phylum and is the genus for Calcareous Sponges. However, the Calcareous Sponges do not have an endocrine system or circulatory system. To make up for the lack of the endocrine system, the calcareous sponges send hormones from cell to cell to ensure that they survive. Calcareous sponges do not move unless they are moved by waves in the ocean.