Description: Canarium urceus (Linnaeus, 1758) Palawan, because of the extensive sand and coral flats off its East side, has a lot of these, in a range of colours. Some may be of different species, but I can't be bothered just now to sort them out. They use their 'foot' to jump out of the sand. Date: 18 July 2009, 15:11. Source: Sikad-Sikad (Jumping Shells) - Little Bear Conch - Canarium urceus (Linnaeus, 1758) - Palawan Uploaded by JoJan. Author: Richard Parker.