no it is not a producer
Their larvae stages are motile stages.
Somethingg from the oceann.
Barnacles are sessile as adults. They start out as mobile larvae and attach to something big like a whale or a boat. Then they stay in this position for the rest of their lives.
Sessile refers to animals that are permanently attached to a surface and cannot move independently. They are typically found in environments where they can easily obtain food and resources without needing to move around. Examples of sessile animals include barnacles and oysters.
sessile animals mean animals that can't move ,such as coral,ascdans,sea sponge etc...
Producing free-swimming larvae allows sessile animals to disperse and colonize new areas effectively. This strategy increases survival rates by reducing competition for resources within the parents' habitat and minimizing the likelihood of inbreeding.
Benthic sessile organisms are marine organisms that live on the ocean floor and remain attached to a substrate, such as rocks or coral. They do not move around like mobile organisms but instead filter feed or rely on currents to bring them food. Examples of benthic sessile organisms include sponges, corals, and mussels.
a hydra as a polyp is not sessile but when it grows to be a hydra it is sessile
Most coral species spawn annually. They release eggs and sperm into the water on a few nights of each year. The eggs are fertilized in the water to produce coral larvae.
During nightfall, the coral reef is able to emerge from it shelters in safety. Larvae will also hatch and disperse at night into the plankton.
Corals and sponges can both reproduce either sexually or asexually. In sexual reproduction eggs and sperm are broadcast into the ocean, where they meet and form a larvae. The larvae drifts around for a bit, and then settles to the bottom. If it is a suitable place, the larvae with turn into a new coral polyp or sponge. Then the coral or sponge reproduces asexually to form the larger colony.