Im a bit concerned that my one tiger barbs belly is about 2x's as big as any other tiger barb in the tank. Visitors keep asking me if i have a pregnant fish! Honestly, i believe this fish is male, I call him The Don of my tiger barb mafia- all day he chases other barbs around, you can tell he is clearly the leader! So is it safe to assume he is male, and not pregnant? He's been this way (noticeably fat!) probably for a month or so. Should i be concerned?

