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The title, which was known as Project Celia during its development, is a similar format to Dennis Publishing's Monkey, but focuses on fast fashion, celebrity videos and user-generated content.

All products shown in the fashion and shopping pages at www.jellyfishmag.com can be purchased directly via a click-and-buy mechanism.

Part of the CosmoGirl! brand portfolio, Jellyfish will be sent out weekly via email. The advertiser-funded title is being tested over the next 14 weeks, after which a decision is due to be made about its long-term viability.

Celia Duncan, editor of the title, said it is being promoted via an extensive viral campaign, as well as print ads in NatMags titles.

The market for teen titles is notoriously tough and media agencies have criticised major publishers for largely abandoning the market. Emap and IPC sold their respective teen titles Bliss and Mizz to Panini - a publisher better known for its collectable sticker-books. Industry insiders argued the publishers would lose young readers' future loyalties by ceding their stake in the market.

Interactivity has become increasingly important to teen magazine brands. Hachette Filipacchi's Sugar has invested heavily in developing its website and events to better connect with the MySpace generation.

Despite many high-profile casualties in the teen print market, Brooklands Group will launch Channel 4 spin-off weekly Popworld Pulp on 11 April, priced £1.49.