Dude, there's an octopus in my mask! Well, a pygmy squid, anyway.

A tiny pygmy has squid somehow managed to find its way into a scuba diver's mask.

Where are you?

Go free! You just knew those mask clearing skills you practiced in your certification course would become handy one day.

Squids hunt at night an often take advantage of divers' lights. They can put out dazzling color shows for scuba divers.

Squid, like cuttlefish, have eight arms arranged in pairs and two, usually longer, tentacles. There are over 300 species of squid.

This one is Two-tone pygmy squid, one of the smaller squids. What exactly is happening here, we're not sure. It almost looks like the poor squid is being attacked by a harlequin ghost pipefish.

Octopus blends into its surroundings. Octopuses together with cuttlefish are highly intelligent, possibly more so than any other invertebrates.

Over 120 species of cuttlefish are recognized.

Recent studies indicate cuttlefish are among the most intelligent invertebrates.

Mandarinfish is a brightly colored member of the dragonet family. It gets its name from its vivid coloration, evoking the robes of an imperial Chinese mandarin.

Pair of Mandarinfish.

Angelfish and butterfly fish look very similar. They have similar shapes and similar color patterns straight from the 1960's psychedelia. They are however easy to tell apart: angelfish does not fit into a frying pan, butterfly fish does.

A juvenile Pinnate batfish approaching maturity. The young have a bright orange stripe outlining their entire body. As an adult the Pinnate batfish is silver in color.

Hermit crab carrying its home.

Starfish or sea stars have five or more arms. They are predators eating sponges, sea urchins and anything else that does not move very fast.

A juvenile bristle tail filefish pretends to be a leaf.

Flying gurnard spreads its "wings" when it gets excited. The wings are designed to scare away predators; not gliding in the air like the fins of flying fish. This photo was taken in Hong Kong.

Most starfish can regrow missing limbs.