Superyacht Tenders and Toys has announced its top five yacht toys for 2016. Here's a look at what clients are buying and renting for use aboard:

High-Powered Electric Bicycles

HPC bikes include the flagship Revolution X model, which is the bestseller among superyachts buying from Superyacht Tenders and Toys.

High-Powered Electric Bicycles
Revolution X modelCourtesy Hi-Power Cycles

Submarines

The Super Yacht Sub 3, a three-person submersible, is available with customized depth capabilities from 328 to 984 feet.

Super Yacht Sub 3
Super Yacht Sub 3Courtesy U-Boat Worx

Lampuga Electric Surfboard

These are quieter than previous-model power surfboards, built of carbon fiber and powered by lithium-ion batteries. (No fuel needed.)

Lampuga Electric Surfboard
Lampuga Electric SurfboardCourtesy Lampuga

Humdinga

This high-speed amphibious vehicle can achieve highway speeds on land and top 30 mph on the water. She is 23 feet length overall with seating configurations for as many as six guests.

Humdinga

This high-speed amphibious vehicle can achieve highway speeds on land and top 30 mph on the water. She is 23 feet length overall with seating configurations for as many as six guests.

Eco-Friendly Golf Balls

Ecobioballs biodegrade and have fish food at their core, making them a favorite among superyacht owners who want to set up a tee on the top deck.

Eco-Friendly Golf Balls
Eco-Friendly Golf BallsCourtesy Albus Golf