The Delaware River is home to a number of different fish species, including trout, pickerel, northern pike, walleye and both largemouth and smallmouth bass, as of 2015. Other species include muskellunge, tiger muskellunge, American shad and American eel. Striped bass and baitfish are also common.
Fishing in the Delaware River is subject to daily limits and minimum catch sizes, and particular species are only fishable during certain seasons. For example, from April 18 through Oct. 15, the daily limit on trout is one to five fish, depending on whether fishing north or south of I-84 or in the West Branch of the Delaware River. Size limitations also vary from 12 or 14 inches to no minimum size, depending on fishing location. Bass-fishing season runs from Jan. 1 through April 17 and June 13 through Dec. 31 with a limit of five fish. From April 18 through June 12, there is no allowable harvest of bass in the Delaware River; fishers who catch bass during this season must immediately release them.
Certain fish in the Delaware River are not fishable at any time of the year, due to their protected statuses of endangered or threatened. Some of these include hickory shad, river herring and sturgeon.