Can you help Lau Lup identify this mysterious creature on his birthday?

Stomper Lau Lup discovered a "scary creature" lurking in his tank yesterday (May 3).

"I found it at the bottom of the tank," Lau Lup said.

"The creature’s movements seemed slow and deliberate."

Lau Lup also said that the creature's body was covered with aquarium substrate.

"Hence, it was extremely difficult to spot it until yesterday evening when it happened to be near a light source," he said.

"Does anyone know what creature this is?"

He hopes that someone can help him identify this creature on his birthday today (May 4).