Tamka is a bulky green crocodile, with a large olive green spot at the end of his long snout, coupled with smaller markings of the same color also on his snout. The bottom of his black eyes green. Some light green markings reside on the side of his ribs. His underbelly is also light green, with a couple of dark spots near his chin. At the end of his tail is a light green stripe, and his tail is tipped with the same shade of green. His scales are dark green, and his claws are black.
Tamka is shown to be overconfident, and lacking in intelligence. He even confesses to the Lion Guard that he himself is not smart. Despite his physical stature, Tamka has been shown to be rather weak, with Kion able to take him down without any problems.
When Ono guides a group of Sable Antelopes down a dead end canyon to help calm them, he accidentally wakes Makuu's Float in the process. Tamka witnesses a mild dispute between his leader, Makuu and fellow float member Kiburi, as the pair argue over the next step, concerned about being awake during the Dry Season. When Makuu leaves to speak with Simba over a new water supply, Kiburi insists they spread out and find theor own water because they're crocodiles. Tamka insists that he's right and follows him to find a new water source.
When Makuu returns, he is furious that they disobeyed a direct order, especially since he and Simba have found them a water supply. The
Lion Guard lead them to their new water source, which leads to overcrowding. Tamka watches in shock as Kiburi challenges Makuu to a Mashindano.
At the Mashindano, Ushari suggests a scheme which could help the crocodiles take over the Pride Lands. They agree to go along with it, with Tamka and two other float members agreeing to take down King Simba while Kiburi participates in the Mashindano. But as the three traitors leave, they are spotted by Ono, who alerts the rest of the Lion Guard. Before they can strike, the Lion Guard catch them off guard. Tamka challenges Kion, but is pinned down by the cub. When Simba discovers the crocodiles, he is furious.
As the Mashindano ends, Makuu assures Simba that he had no knowledge of their plan, and banishes not just Kiburi, but also Tamka and the other two crocs from the float. Simba then banishes them from the Pride Lands, and the group leave.
In the Outlands, they meet up with Ushari, who leads them to a volcano with the promise of something amazing. Here, they meet Scar, who begins to tell them of a plan that he has, which will allow them all to take over the Pride Lands.