The Tribal Turtle is the only Tower or Special Agent that can be placed on both land and water.
The Tribal Turtle can be placed half on water and half on land.
The first three Daily Challenges after the Tribal Turtle update all provided some free Tribal Turtles. The first two gave one turtle, while the third gave two.
April 7, 2012 had a Daily Challenge that gave 8 free Tribal Turtles.
When the player places a Tribal Turtle on water, there will be ripples around it. When placed on half water, half land, the ripples won't appear.
This agent is the only non-pro agent that can pop Lead Bloons in a normal situation (the Bloonsday Device uses an ability and the Angry Squirrel needs to be enraged). However the Tribal Turtle can't pop leads with both attacks.
When the Tribal Turtle is first placed, it has both the spear and coconut in its hands. The Tribal Turtle will throw both the spear and coconut on its very first attack, similiarly to its pro version.