Ah, tulingan is okay naman during pregnancy, but wag lang sobrang dami because some of us moms avoid high-mercury fish when we're preggy, tulingan can have a bit of mercury kaya better to eat it in moderation lang and balance it with lower-mercury fish like tilapia or bangus. Better to check with your OB about how much is safe for you specifically and your situation, pero generally the bigger fish and those we eat frequently are the ones we watch out for, good thinking na you're asking!