Triton Portal

You can channel your inner magic to summon allies.

Prerequisite: Character level 5th, hydraulic push spell- like ability, undine.

Benefit: Once per day, you may expend your racial hydraulic push ability to instead cast summon nature’s ally III as a spell-like ability with a caster level equal to your character level. This use of the ability can only summon a Small water elemental or 1d3 dolphins. Using this ability is a full-round action.

Source: Advanced Race Guide