Grinexx

Grinexx is a boss that appears in. It is the Lorulean counterpart of Trinexx, and like Trinexx in, it is the boss of Turtle Rock. It shares quite a few similarities with Trinexx, such as a long neck, a stone shell, and rock like skin. It guards the portrait of the sage Impa.

Appearance and Weaknesses
Grinexx begins the fight swimming in the lava underneath the arena, and attacks Link by erupting lava from its volcano-like back, which can go through the floor since it is a grate. During this phase, Link must use the Ice Rod to hit Grinexx as it passes under the holes of the arena, while also taking care not to get hit by the naturally erupting bursts of lava. Grinexx will occasionally retaliate by erupting lava and chasing Link around, but a hit from the Ice Rod will calm it down.

After sustaining enough damage, Grinexx will jump onto the main arena and attack Link more directly. Link's Sword and other weapons can now damage its head in this phase, though it will often shoot out its head with its long neck and try to bite Link. Grinexx will occasionally curl up into a boulder, and release a devastating explosion. This attack is extremely damaging, so it is advised to run away from Grinexx as soon as it curls into its shell. It can also spin around while tucked in to its shell, sliding and ricocheting on the sides of the arena. The safest way for Link to avoid this attack is to stay in the corners as it bounces around the arena since Grinexx cannot fit in those areas. It should also be noted that all of the attacks that it uses in its second phase can be deflected with a Shield; its explosion attack can be blocked by the Hylian Shield. After hitting Grinexx, eventually, the boss will fall, revealing a Heart Container and Impa's painting.

Trivia
Grinexx is probably based on the real-life animal known as Alligator Snapping Turtle, they're known for their extended necks and their snapping bites just like how Grinexx attacks Link.