Depthmon

Depthmon is the Armor Digivolved form of Veemon through the Digi-Egg of Reliability. Water battles are his specialty as he is able to swim like a fish. The armour Depthmon wears can withstand underwater pressure, enabling him to dive to the very bottom of the Ocean.

Digimon Tamers: Battle of Adventurers
Depthmon was one of the Digimon guarding VP Labs when Takato and Kai ventured there to rescue the kidnapped Minami. Attacking their boat from beneath the water, Depthmon seized Seasarmon, Minami's partner, and dragged him below the waves. However, he was no match for the canine Digimon's power and was easily destroyed.

Digimon Savers: Ultimate Power! Active Burst Mode
An army of Depthmon guarding in a Harbor bay to attack Agumon, Rhythm, and their friends but were defeated.

Digimon World 3
Depthmon is one of the digimon that help you progress of the making of the 5 legendary weapons. He can be found in Asuka Server's North Sector, in the Lake of Ice if the rookie is Veemon. If the rookie is Agumon, then he can be found in Amaterasu's Central Sector, in Shell Beach's seabed. If the rookie is Guilmon, he can be found in the same place, in Asuka Server. If you give him Vanquish and Venom Fang, he will make Destruction.

Attacks
 * Bubble Bombs: Creates bubble-shaped bombs that increase in size until they explode.
 * Sargasso Drag: Creates powerful currents to pull the opponent around in basically a whirlpool.
 * Marine Knives: Pulls out sharp blades and launches them at the opponent which inflicts critical damage.
 * Power Pulse: He shoots green energy bullets from his hands. They look like fists