This is a random collection of various videos, mixed or unedited, from free dives, snorkeling, underwater fishing and scuba dives, over the last few years.

Winter dive at Kallianou bay in Sourth Evia (Aegean sea), in freezing waters, perfect visibility and full dive gear.
Music track: "Home" - Depeche Mode

A collection of short free dives in shallow waters, taking a close look at the marine life in summer.
Music track: "Porcelain" - Moby

A very bold (or very stupid) young octopus wanders around in shallow waters, making little effort to avoid the camera.
Sound: natural bubbles!

Slow (free) ascending from a free dive, looking at the surface. The closest thing to zero-gravity floating in space.
Music track: "Making of Cyborg" - Ghost in the Shell OST (by Kenji Kawai)

Low 'flying' at the bottom of the sea, during a series of free dives.
Music track: "Sargasso Sea" - Salt Tank

Chilling winter scuba dive late in the afternoon, 'blind' navigation and exit at dusk.
Music track: "In Morte Sumus" - System Shock II OST (by Ignacio Segura)

Summer scuba dive in warm shallow waters, drifting with the current along the shoreline.
Music track: "Guild Wars 2" - Official trailer at Gamescon 2011

This crab is probably named Speedy Gonzalez...
Sound: (natural underwater)

Chasing the dragon... Don't worry, it's more afraid than you.
Sound: (natural underwater)

Medium-sized octopus, getting into defence mode as I approach over it.
Sound: (natural underwater)