Caulerpa lentillifera or what the people of Rembang call latoh is one of the local commodities that has the potential to be developed. Unfortunately, public awareness to cultivate it is still low. The high nutritional content and potential for export to countries such as Japan and Korea have not aroused the interest of the people in Rembang to manage it seriously. So far, latoh is only sought traditionally and not massively cultivated. Because people used to get it easily, just go to the beach and latoh can be found easily. People feel that there is no need to cultivate it because it is considered something easy to find, so it does not need to be preserved. Until now, there has come a time when latoh is rarely found and the price on the market is also relatively expensive for the surrounding community. Whereas people in Rembang have a culture to consume latoh, namely to process it into urap.

Reflecting on the existing reality, the Community Creativity Program-Community Service (PKM-PM) team from Universitas Diponegoro tried to find a way out of the existing problems. The team, which consisted of Bahrul Ulum Habiba, Aji Rusanto, Zavia Ananda Safitri, and Chrissilia Yunia Atmojo, who was mentored by Kadhung Prayoga, SP, M.Sc, also took the initiative to create “Community-Based Latoh Ecotourism as an Effort to Preserve Local Commodities in the North Coast of Java, Rembang Regency. “. These four students chose Pantiharjo Village in Kaliori District, Rembang Regency as a pilot village. Based on the narrative of Bahrul Ulum Habiba as the team leader, this village was chosen because the majority of the people are fishermen who were affected by the pandemic, their income had to drop by up to 50%. Moreover, women in Pantiharjo Village also do not have productive activities. It is hoped that with this program the income of fishermen’s families will increase and a latoh ecotourism area can be formed which at the same time educates the surrounding community.

The current condition in Pantiharjo Village is that there is only one person who works as a latoh seeker. This is motivated by the risk in taking latoh, latoh seekers must dive to a depth of approximately one meter and be carried out at midnight if they want to get optimal results with fresh conditions. However, the search for latoh cannot be done every day due to seasonal problems and the availability of latoh in nature. Therefore, this community service program uses a pond as a medium for latoh cultivation. This technique is considered ideal because it is simple, does not require high costs, and is easy to maintain for tools and commodities. Plus the reservoir pool technique does not require a large area so that it can be developed on limited land. Moreover, there is no concept of community-based latoh cultivation in coastal areas so that this activity is expected to be a pilot project for coastal community empowerment. When it develops into an ecotourism area, it can also be used as a community reference, especially school children to know the process of latoh cultivation and as a means of education. Considering the current generation in Rembang, many do not know what latoh is like.

In preparation for this program, it is done by inviting the community through socialization which is carried out online and offline. Activities that are then carried out during this service program are in the form of searching for location points in making ponds which of course must meet certain criteria, finding partners, socializing with the surrounding community, licensing with the Pantiharjo Village government, and finally implementing activities. In the implementation of the activities carried out, namely collaboration with the surrounding community for cooperation in the manufacture of aquaculture ponds. After all the making of the pool is complete. the team and partners checked and tested for leaks in the pond and installed various equipment needed for cultivation. Partners are then trained by the team regarding cultivation and maintenance activities.

The implementation of cultivation is carried out with the initial stages, namely nursery, care, harvest and post-harvest, the establishment of ecotourism, and evaluation. At the nursery stage partners are taught how to choose good seeds and those that have the potential to grow and of course are fresh. Partners do hands-on practice by going into the field to do nurseries using a pair of bamboo boxes as a substitute for substrate attached to the latoh roots. The next step is maintenance, the maintenance carried out is in the form of cleaning the pool using a filter to pick up dirt in the pool, changing the water once a week. Next is fertilization which is done twice a week. It ends with harvesting and post-harvest training so that the selling price of latoh can increase.

In the next stage, namely the establishment of a latoh ecotourism village. The formation is carried out by structuring the area around the pond, preparing the necessary needs, strengthening human resource capacity, and disseminating information through social media such as the @ekowisatalokanom tik tok account. This activity was felt to have a significant impact on the women in Pantiharjo Village. “This program is very well done, it is hoped that it will be sustainable. Considering that latoh is increasingly rare and this is a real effort to maintain its sustainability.” Said Mrs. Saripah, as Chair of PKK Pantiharjo Village.