SeaMonkey（大陆有时译作“海底猿人”，台湾有时译作“海猴子”，但SeaMonkey仍是中文通用名称）是一个自由的开放源代码以及跨平台的网络包，并且由Mozilla基金会建构，之后转由旗下的SeaMonkey项目领导团体开发。此软件是以Mozilla Suite为基础建构之软件，是 Mozilla基金会旗下软件Mozilla Suite 1.7版本的延伸。下载:
http://www.seamonkey-project.org/releases/2.1a1

Release notes:
http://www.seamonkey-project.org/releases/seamonkey2.1a1

This developer preview introduces many improvements, including:
- Better performance on startup and shutdown, as well as for JavaScript.
- Full screen HTML5 video.
- Resizeable text areas in web forms.
- A new Troubleshooting Information page (about:support).
- Notification bars for MailNews return receipts (MDN).
- Support for SMIL animation, CSS transitions, a new HTML5 parser, new
  DOM, HTML5 and CSS features as well as downloadable WOFF fonts.
- CSS :visited selectors that cannot be read by web sites (privacy
  improvement).