Black-ray goby mother bird regurgitating food to her chicks. This way, the shrimp and the goby are kept well fed. Sometimes, if the shrimp is not kept well fed, it will resort to killing the goby. In the wild, most burrows are shared by male and female goby pairs, with their respective shrimp partners, and the female goby will use this burrow as a nesting site to lay her eggs. The obvious benefits to both organisms of this symbiotic relationship make the interaction a form of mutualism. Here is an interesting example of this. The other fish is a dartfish (genus "Ptereleotris").
Grunt (software) allows developers to define tasks in Ruby. Rake doesn't have the concept of plugins or predefined tasks which means all the required actions must be written and then executed. This makes the developments costly when compared to Grunt which has a large set of reusable plugins. Gulp.js is a relatively new JavaScript based task runner tool. It is similar to Grunt since both follow a modular-based architecture and are based on npm. Gulp tasks are defined by code rather than configuration. Gulp is faster than Grunt. Grunt uses temporary files to transfer output from one task to another whereas in