# Shark links

Storyspace 3 defines a new link type, shark links with a special behavior. If the reader visits a note, and if that note has a shark link with a satisfied guard field, the shark link is followed immediately and automatically.

For example, if the protagonist tries to board a bus to New York but has no bus ticket, a shark link could escort him off the bus.

> From (source): All Aboard! New York!

> To (destination): A Stern Reprimand

> type: shark

> guard field: `$Ticket==false`

The note named “All Aboard! New York!” may have any number of inbound links. However we arrive, if we don't have a ticket, we don't visit the note about the bus’s departure, but instead visit “A Stern Reprimand”. If we later return and have a ticket, the guard field will be unsatisfied and the shark link will not interfere.