Speleothem with diver in the background in the cenote Dos Palmas in Mexico. The caves in Mexico are the best ones in the world.
Shortlisted!

The toad migration in the Netherlands. This phenomena only lasts a few days. The toads are looking for a place to drop their eggs.

A short beautiful life
The water lilies attract various pollinating insects within their 4 days lifespan. They draw back underwater, the seeds ripen, float along streams, and finally sink into the mud where they germinate to begin a new life cy...

The look and the grin
Nile Crocodile in a small fresh water stream

Esox lucius (nothern pike) in its environment at Ekeren. (f/9, 1/160, ISO-640, 18mm). - Erik

A white Cyprinus carpio (common carp) in a lake at Ekeren. (f/22, 1/160, ISO-3200, 50mm). - Erik

Fresh water nudibranch in the Netherlands. Not as colorfull as in salt water in the tropics, but even a very beautifull creature.

Ponte dei Salti

Verzasca

Eye of a brown frog that tries to stay under water during the wintercold. You can see the third eyelid of the eye.

Larvea of a brown frog. the small 'fishes' have really nice mouths, they are really cute.

A picture took from garbage. I have a longer lasting project to take pictures of garbage I find under water. This time it was a Barbie doll, the perfect woman for kids. But now dropped, headless and green of algea. A bigger contrast almost impossible

This divesite is not a lake, but a tank filled with water. It is called the 'Gasometer'. In this tank there are several objects placed to explore. Maximum depth 14m, diameter 45m.

Curious common carp (Cyprinus carpio) in La Gombe, an old open quarry. (f/3.5, 1/160, ISO-2500, 17mm, no strobe). - Erik

hieroglyphic turtle @ fresh pond in Antwerp

Nature is harsh. This brown frog did not survive the winterperiod. It is covered with mold. In this lake brown frogs can be found at 16-20m depth where they try to survive the winter under water.

Riverdiving in the Verzasca river in Switzerland.

European Catfish - Silurus glanis
Shortlisted!

Under the bridge, Verzasca

A magical moment, one of those amazing coincidences by Mother Nature.

An eel in a lake in Germany.

This picture is taken in an old mine that was already in use around 1900. It has been closed before world war 1. The mine is clear on the way in, but has zero viz on the way out. Taking pictures is hard, every wrong movement gives a siltout.

Catfish Action! (Silurus glanis)
Shortlisted!

Driftdive

Verzasca

Zander in the Netherlands

A nice pike in the Netherlands.