Trap long stretch creek, which didn't turn out be good for rats an pull almost all traps today, back last winter I got otter upstream aways, not big creek but deeper in spots an pools, occasional otter on creek. Wonder how far they travel or what gets them travel? Was think set a 330 about 3 ft deep water in between pools where rocks make kinda a dam an clay bank with narrow deep passage about 3 ft deep, do otters sometimes just swim bottom an not top ? I got cpl other otters that way in other location. I had 2 colonys in channel for cpl days but pull today , it would not work out to use blocking at location

Bottom edge set works well for otters.

Sure do. Bottom edge set works great.

X3 on the bottom edge sets for otter. Especially in narrow channels.

Try the deep passage...yes