The Spinex is a powerful Brute Wyvern first introduced in Monster Hunter Y. It first appears at the end of Low Rank, but can be fought more times in High Rank Quests.
Spinex is very similar to the real life Spinosaurus. It is blue in color, with an aquamarine sail, blue scutes running down its body, and dark blue claws that turn light blue when it is about to do an electrical attack. It also has blue spikes on its head, its sail, and the sides of its tail, as well as yellow eyes that turn blue when enraged. As well as this, it has large arms with 3 fingers on each hand, a crocodile-like mouth, and webbed feet, similarly to Spinosaurus.
It likes to stay near water, so it is found in watery areas like the Jungle, Swamp, and Dunes. As well as this, it likes to dive into the waters of the Deserted Island to attack underwater prey. Spinex has also been seen in the Heaven's Mount.
Trample: Spinex will will rush at a hunter and deal damage and knockback if the attack hits him/her.
Bite: Spinex will open its mouth and attempt to bite at a hunter. This attack is powerful, and if it causes a hunter to faint for the 3rd time, then Spinex will throw him/her into its mouth, close it on him/her, and swallow him/her.
Claw Swipe: Spinex will rush at a hunter and swipe at him/her with one of its arms. This attack is powerful.
Stomp: Spinex will raise its right leg and smash it into the ground, causing a tiny earthquake and dealing a lot of damage to hunters who are touching it.
Tailwhip: Spinex will spin around and swipe its tail at a hunter.
Roar: Spinex will pull its head back and then open its mouth and let out an ear-splitting roar. This attack can be performed 2 times in a row.
Running Roar: Spinex will start running at a hunter while roaring, similar to Tyrannicus and the MHY Yian Garuga.
Thunder Claw Swipe: Spinex will charge up its claws and do its famed Claw Swipe. This attack is powerful, and inflicts Thunderblight.
Lightning Ball: Spinex will open its mouth, rush forward, and shoot a ball of lightning at the hunter. This attack inflicts Dragonblight.
Lightning Fling: Like most Bird Wyverns, Spinex will charge in a certain direction while flinging thunder balls from left to right. This attack inflicts Thunderblight.
Thunder Jump: Spinex will leap at a hunter and shock him/her, similar to Khezu.
Flash Attack: Spinex will charge up its claws and smash them on the ground, causing them to flash and blind hunters in a similar manner to Gypceros and Crimson Qurupeco. (Note that Spinex closes its eyes before smashing its claws on the ground.)
Thunder Roar: When enraged, Spinex's eyes will turn blue, and it will combine electricity with its roar to shock hunters, similar to Diorekkusu.
Rampage: Spinex will run at all the hunters attacking it while smashing its feet on the ground and causing tiny earthquakes. This attack is powerful, and could quickly kill you if you aren't careful enough.
Lightning Beam: Spinex will snap its jaws 3 times and then shoot a beam of lightning at a hunter, similarly to Berukyurosu. This attack is strong, and inflicts Thunderblight.
Lightning Dance: Spinex will spin around and stomp 4 times while unleashing 4 lightning orbs to home on a hunter. This attack is strong, and inflicts Thunderblight.
Brutal Tear: Spinex will roar before running at its hunter target while charging up its claws. It will then swipe at him/her 2 times before taking a bite out of him/her. This attack is dangerous, as it can cause an OHKO.
Underwater Charge: Spinex will swim in a loop before charging at a hunter. This attack deals damage and knockback if the attack hits him/her.
Spinning Bite: Spinex will twirl around before biting a hunter. This attack is powerful, and if it kills a hunter, then Spinex will throw him/her into its mouth, snap on him/her a few times, and then swallow him/her.
Turning Claw Swipe: If Spinex is facing away from a hunter, it will turn to face the hunter, using its claws to propel itself. If its claws hit a hunter, they do a high amount damage.
Turning Thunder Claw Swipe: Spinex will charge up its claws and do its famed Turning Claw Swipe. This attack is powerful, and inflicts Thunderblight.
Thrash: Spinex will twirl around before flailing around and biting. Both the bite and tailwhip part of the attack are powerful.
Electric Discharge: Spinex smashes its claws together to produce a discharge field around it. This attack is powerful, and inflicts Thunderblight.
Underwater Thunder Roar: When enraged, Spinex will do its famed Thunder Roar attack underwater.
Destructive Dash: Spinex will charge up with electricity before zooming around the area and rushing at a hunter at full speed. This attack is powerful, inflicts Thunderblight, and could quickly kill you if you aren't careful enough.
Underwater Lightning Beam: Spinex will do its famed Lightning Beam attack underwater.
Location: Jungle Area 11
Synopsis: The hunter enters a small clearing in the jungle where a river runs. He/she also observes that there is a light grey Brute Wyvern fishing in that area. He/she decides to sneak attack it, and jumps on its back. It emits a small roar and flails wildly in an attempt to get him/her off. It finally gets him/her off with a stomp, and then turns around and notices its attacker. It lets out a loud roar, and the hunt begins.
Location: Deserted Island Area 7
Synopsis: The hunter enters a cave in the Deserted Island. All of a sudden, he/she hears barking calls, and a pack of Jaggi (led by a Great Jaggi) rush towards the hunter. They attempt to terrorize the hunter, until all of a sudden, a crocodile-like head bursts out of the water nearby, grabs the Great Jaggi (scaring away all the other Jaggi), and goes back in the water. The hunter then jumps in the water and sees that it was a Spinex that killed the raptor, and the hunt begins.
- Fire: 0
- Water: +5
- Thunder: +5
- Ice: 0
- Dragon: 0
- Fire: 0
- Water: +5
- Thunder: +5
- Ice: 0
- Dragon: 0
- Spinex is the only semi-aquatic Brute Wyvern in Monster Hunter Y.
- When low on stamina, Spinex will fall over when doing stomp-related attacks.
- When low on stamina, Spinex will eat fish from a nearby water source.
- It will also eat Kelbi, Slagtoth, Aptonoth, and Gargwa.
- Spinex can be affected by the Apex Status.