I'm not sure what the first one is (maybe @taricha or @Dan_P would have an idea there), but the bottom one is a bristleworm of some variety, and it's most likely harmless. It may have just been scavenging the dead fish; I strongly doubt it caused it any issues.
I'm not sure what the first one is (maybe @taricha or @Dan_P would have an idea there), but the bottom one is a bristleworm of some variety, and it's most likely harmless. It may have just been scavenging the dead fish; I strongly doubt it caused it any issues.