Chestnut Lamprey Ichthyomyzon castaneus
This species was found at 0 bioassessment sites, 0 rapid fish bioassessment sites, 1 fisheries assessment site, and 0 fisheries presence-only assessment sites. In total, it was collected at 1 distinct sites, or 0.1% of the 1522 total sites monitored by the bioassessment program. It is the 133rd most commonly collected species.
The Chestnut Lamprey was collected in 0 bioassessment sampling sessions and 1 fisheries assessment session. It was present in 0 rapid bioassessment sessions and 0 presence-only sessions.
The biological assessment program has collected a total of 1 individual Chestnut Lamprey specimens, ranking it the #141 most collected fish.
The Chestnut Lamprey differs in appearance from the Silver Lamprey by several features. The dorsal fin is continuous without the double lobes. The mouth is a sucking disc, but the circumoral teeth are nearly all bicuspid, or two-pointed. There are 51 to 54, usually more than 52, myomeres or segments in the body between the last gill slit and the anus. This lamprey reaches 8- to 13-inches long.
HUC12 watersheds where this species has been found