Avast! Pirates will invade West Sayville this weekend, seeking treasure and landlubbers to join their crew at the seventh annual Pirate Festival at the Long Island Maritime Museum.

“It started with a couple of hundred people attending, now we have 5,000 come in two days,” says festival producer Kathleen M. Prokesch. “We have pirates of all different kinds. It’s a Disney-like experience.”

There are no carnival rides, but adventures will pop up at every turn, including petting zoos, pony rides, nautical-themed arts and crafts, a pirate costume contest and sails aboard the 65-foot oyster sloop Priscilla ($28 a person, includes admission). Watch as Gypsy Geoff provides an interactive circus experience that includes hat juggling, plate spinning and marionettes, then grab some grub at 10 food trucks serving crabcakes, burgers and fries, ice cream and ices.

Here are the pirate gangs you will encounter and the lingo to communicate with them.

MOTHERLOAD OF BOOTY (massive treasure)

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The Kings of the Coast return with a new show that ends with an interactive treasure hunt.

“It’s kind of like an old Warner Bros. cartoon,” says Tom McKenna of Levittown, who plays Black Jack Callan. “One of our old mates’ daughters came back to us with a piece of a treasure map. The mutiny pirates try to take it by running out of camp. The good pirates gather up kids from the crowd and go find the treasure. Once the treasure is found, we share it!”

PERFORMANCES Both days at 1:15 and 3:45 p.m.

SHIVER ME TIMBERS! (an expression of surprise)

There’s always a surprise coming from “The Greatest Pirate Story Never Told!,” a semi-scripted musical in which half the show is improvised based on audience suggestions.

“It’s a different show every time you see it — never the same show twice,” says Christopher Leidenfrost of Baldwin, who plays Capt. Henry Martin. “There are just as many jokes for the adults as there are for the kids.”

PERFORMANCES Both days at 1 and 3:30 p.m.

FIRE IN THE HOLE (warning before cannon is fired)

There will be plenty of action going on with the Valhallas Pirates, whether it’s a pistol duel, sword fight, whip demonstration or cannon firing.

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“There’s a lot of comedy. We try to be as period correct as possible by adding realistic wardrobe, accents and character,” says Dr. Charles Waldron, who plays Capt. Charles W. Black. “A great deal of pirate history is divulged in our shows.”

PERFORMANCES Both days at 11:30 a.m. and 2 p.m.

SWASHBUCKLER (an adventurous and romantic swordsman)

Enroll in Pirate School! with professor Billy Bones, who will teach you how to talk, laugh, stand and handle a sword like a pirate.

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“Kids are already halfway to being pirates,” says David Engel of New Paltz, who plays Bones. “I just harness the natural energy they already exhibit.”

PERFORMANCES Both days at 1 and 3 p.m.

CHANTEY (sailor song)

Sing along with the Roving Blades, the Crimson Pirates and the Brigands as they perform songs of the sea at various points throughout the day.

“We focus on upbeat rhythmic kind of music,” says Robin Flanagan, who portrays Grace O’Malley in the Crimson Pirates. “Kids can’t help but get excited by dancing or jumping up and down. They are drawn to the energy.”

At the end of each day, all three groups come together for a Pirate Pub Music Jam.

PERFORMANCES Both days: The Brigands, 11 a.m. and 2:30 p.m.; the Crimson Pirates, 11 a.m. and 4:30 p.m.; the Roving Blades, noon and 2 p.m.; Pirate Pub Music Jam, 5:30 p.m.

AYE, MATEY! (cheerful greeting)

The Ye Pyrate Brotherhood is a friendly pack o’ pirates who put on a 20-minute show that’s action-packed but not too violent, laced with comedy and concludes with a treasure hunt.

“We strive for a visual educational and fun experience mixing comedy and historical references,” says Karen Overin who plays Lucretia Lacey. “The crew wants to find the treasure that is hidden and add some new members. The audience has to help us choose who passes the pirate tests.”

PERFORMANCES Both days at noon and 4:30 p.m.