I took some screenshots because isn't that easy to explain how works with barnacles:
1- Barnacles aren't visible but I can interact with
2- I can scrape an invisible barnacle
3- After scraping the barnacle appears
4- Then the barnacle disappear again but I can see I have havested 1 and is in my bag
5- Then they disappear again and I can interact with 2 of them
6 - I scrape again and only one appears after the action
7- Then I am ready to do the action and the barnacle disappears in the meanwhile before the harvest
8- After the harvest (2 barnacles) only 1 appears and not 2 as they are supposed to be
I tried to do my best to explain how they look
and moreover I add that I can scrape more times the same barnacle I consume energy I have Img but obviously I havent a + 1 barnacle in my bag
I took some screenshots because isn't that easy to explain how works with barnacles:
1- Barnacles aren't visible but I can interact with![barn1](https://cloud.githubusercontent.com/assets/6795607/16122800/c4c2f8e4-33e8-11e6-9815-6ce94c27ff34.PNG)
2- I can scrape an invisible barnacle![barn2](https://cloud.githubusercontent.com/assets/6795607/16122843/faf58cba-33e8-11e6-9598-c39b65ba6928.PNG)
3- After scraping the barnacle appears![barn3](https://cloud.githubusercontent.com/assets/6795607/16122879/2db05dc4-33e9-11e6-9955-2ebf6e0dcc2f.PNG)
4- Then the barnacle disappear again but I can see I have havested 1 and is in my bag![barn4](https://cloud.githubusercontent.com/assets/6795607/16122932/682592d0-33e9-11e6-91e6-d3b18a3e2836.PNG)
5- Then they disappear again and I can interact with 2 of them![barn5](https://cloud.githubusercontent.com/assets/6795607/16122976/8c88b076-33e9-11e6-9930-74f58998987a.PNG)
6 - I scrape again and only one appears after the action![barn6](https://cloud.githubusercontent.com/assets/6795607/16123087/fede6e22-33e9-11e6-898c-4a722ecfb11a.PNG)
7- Then I am ready to do the action and the barnacle disappears in the meanwhile before the harvest![barn7](https://cloud.githubusercontent.com/assets/6795607/16123126/2a22d7d0-33ea-11e6-8773-54481f9c2e2c.PNG)
8- After the harvest (2 barnacles) only 1 appears and not 2 as they are supposed to be![barn8](https://cloud.githubusercontent.com/assets/6795607/16123162/5159b54e-33ea-11e6-807a-786d8002ae74.PNG)
I tried to do my best to explain how they look and moreover I add that I can scrape more times the same barnacle I consume energy I have Img but obviously I havent a + 1 barnacle in my bag
Hope that all these could help