Slack O’ Mander is the Omnitrix’s DNA sample of a Millgan from the now destroyed planet of Anur Millgan.

Height - 7 Ft 5 In Body - Humanoid Fish

Underwater Breathing - Slack-O-Mander can only breathe underwater. Thus allowing him to traverse deep oceans and survive deep waves.

Enhanced Swimming - Due to his aquatic physiology, Slack-O-Mander can swim at incredibly fast speeds, easily surpassing a jet whilst swimming underwater.

Bioluminace - Slack-O-Mander can make himself glow in the dark. Brightening even the darkest of areas over meters.

Pressure Resistance - Slack-O-Mander can withstand the pressure of beyond the lowest depths of Earth’s oceans. This also makes his skin highly durable to attacks and grants him enhanced strength.

Dehydration - Due to his aquatic physiology, Slack-O-Mander can only survive in water. Once he is above water, he can only survive for about a minute before passing out

Bright Lights - Since his species evolved to live primarily in dark areas, Slack-O-Mander can be disoriented by bright lights and strobes.