Whales are considered the second-smartest species, lacking only humans’ ability to perceive time and to wear hairstyles ironically. Scrutinize less-refined life forms with today’s Groupon to Next Level Sailing. Children under 2 years old are admitted for free. Choose between the following options:

• For $39, you get a sailing adventure for one adult (up to a $99 value, depending on the season).
• For $137, you get a family sailing adventure for two adults and two children 12 years old and younger (up to a $302 value, depending on the season).

The whale-watching sailing adventure includes:

• A four-hour yacht excursion
• Blue-whale watching from July to mid-September or baja gray-whale watching from mid-December to mid-April
• Admission to the Maritime Museum of San Diego
• Snacks and soft drinks on board during summer/fall or BYO lunch and drink during winter/spring

During blue-whale-watching sunset tours, Next Level Sailing's captains set sail through San Diego Bay into the nearby ocean in search of migrating cetaceans. Embark on a marine journey inside a low black schooner, a replica of the 139-foot, quadruple-sailed yacht that famously won the 100 Guinea Cup in 1851 and less famously won a breath-holding competition in 1852. Amid rope rigging, gold emblems, and polished timber, families can play I Spy with spouting dorsals and splashing flukes. After filling eye-crannies with whale-dotted vistas, the ship returns as the fiery sun lowers itself into an oceanic bubble bath.

Ease sea-air-induced tummy grumblies with provided snacks, or sip on an alcoholic drink from the bar or your own bag, as Next Level Sailing allows bring-your-own beverages. Before or after the high-sea voyage, meander through the Maritime Museum of San Diego's other historical and replica vessels, including steamboats, submarines, and seaworthy origami.

Though Next Level Sailing sometimes features a discounted price online, this Groupon still offers the best deal available.