Snapping shrimp is the well-known source of biological sound in subtidal zone. Sounds were created by imploding a cavitation bubble which is generated under the tensile forces of the claw after a high-velocity water jet has been formed. The sounds of snapping shrimp is not only for attacking and defending, but also for communicating with each others. These sounds thus become the material of studying complex behavior arisen from interaction between individuals. This paper studies the change of fractal dimension of snapping shrimp¡¦s noises in different condition of environment. Sounds of snapping shrimp in Chigu lagoon and Tanshui estuary were recorded respectively. With the help of computer software to edit and calculate, the fractal dimension was taken as indicator for the complexity of communication. The behavior was assumed to be affected by many factors at the same time. Analysis of multiple regression with fractal dimension as dependent variables show that the fractal dimensions increased with night time, water temperature, and the ebb tide, but decrease with light intensity. Diurnal hour is the most significant factor in Chigu area. Analysis of Tanshui¡¦s data showed fractal dimension decrease with water depth.

Patent information can provide up-to-date technological data that accelerate the development of new products and the improvement of technology. They also can provide a most useful survey of known solution possibilities, which avoid duplication and the resources wasting. Therefore, this study focuses on the patent searching and analysis of the mechanical overload protection devices. Patent information are fed into computer databases and stored for design around activities. The connections between biology and technology be called as bionics or biomimetics can lead to very useful and novel technical solution. This study introduced special underwater creatures ¡§snapping shrimp¡¨ which have a large claw can generate the snapping action. This action inspires us to find a new technical solution that using the liquid cohesion to store and release the energy. In the end, using the patent information and the new solution to achieve the new design of mechanical overload protection devices, include ¡§Force-Type¡¨ and ¡§Torque-Type¡¨.