To find out what type of fish it is, you would need to provide more context. Here's what could be helpful:
* Where did you hear the name "sheelavathi fish"? (e.g., a specific region, language, or market)
* Can you describe the fish? (e.g., size, shape, color, what it looks like)
* What is the fish used for? (e.g., food, bait, aquarium)
With more information, it's possible to identify the fish and find its English name.