Coach: Jan Bidrman.
2018 state finishes: Boys, 7th; girls, 4th.
Boys returning state swimmers: Cael Dice, jr.; Alex Petty, sr.; Adam Piro, sr.; Alex Provost, jr.; Charles Roberts, jr.; Nolan Wolfe, so.
Boys outlook: Petty, who placed second at state last season in the 100-yard breaststroke, is among the state's top seniors. Roberts also returns after placing fourth at state in the 500 freestyle.
Girls returning state swimmers: Jillian Altmaier, jr.; Marusha Ather, sr.; Ellie Buresh, sr.; Claire Griffin, jr.; Ava Hunt, so.; Elizabeth Jurich, sr.; Rayegan Kent, sr.; Molly Lienemann, jr.; Payton Mayfield, sr.; Sydney Moore, jr.; Rianna Mueller, sr.; Hayley Piippo, jr.; Ava Winjum, jr.
Girls outlook: The Spartans return a lot of swimmers from last year's team that placed fourth at state. Ather placed fourth at state in the 100 breaststroke, and Altmaier and Griffin lead a talented junior class.
Coach: Richard Conradt.
2018 state finishes: Boys, 18th; girls, 11th.
Boys returning letterwinners: Hussein Al Haddad, jr.; Aaron Harris, jr.; Breckin Killingsworth, jr.; Wail Labrouchi, jr.; Sam Mitchell-Sturgeon, sr.; Max Pearson, sr.; Charles Sieglaff, jr.; Isaiah Winston, jr.
Boys outlook: The Links will have a lot of young swimmers in the pool. Nine juniors, three sophomores and a freshman are expected to contribute.
Girls returning letterwinners: Colleen Arnold, sr.; Meghan Bade, jr.; Harper Lawson, jr.; Nella Maynard, jr.; Johanna Schubert, sr.; Emily Smith, sr.; Katie Smith, so.; Anna Sump, sr.; Adrian Vavala, jr.; Ragde Vazquez, jr.; Olivia West, jr.
Girls outlook: The Links return several swimmers from last year's team, including Schubert, who scored points at state in the 50 and 100 freestyles. The four members who made up the 200 freestyle team that finished sixth at state all return, too.
Coach: Jace Ahlberg.
2018 state finishes: Boys, NA; girls, 23rd.
Boys returning letterwinners: Tyler Akins, jr.; Jaren Hilger, sr.; Hunter Kinnaman, jr.; Mason Pair, so.; John Pham, so.; Jackson Quevedo, jr.; Xander Schmit, sr.
Boys outlook: The Navigators remain young, but several swimmers picked up valuable experience last season.
Girls returning letterwinners: Victoria Foster, sr.; Sophia Halsted, jr.; Jessica Gardner, sr.; Jenna Miller, jr.
Girls outlook: The Navigators return one of the state's top divers in Gardner, who finished eighth at state last year. A handful of freshmen could contribute immediately.
Coach: Kyle Hunt.
2018 state finishes: Boys, 8th; girls, NA.
Boys returning letterwinners: Caden Feit, jr.; Mason Montgomery, jr.; Mason Kozak, jr.; Graham Heiser, jr.; Adam Termaat, sr.; Quinn Keller, sr.; Cooper Applebee, so.; Jadeon Hawkins, so.
Boys outlook: Feit could contend for state titles in the sprints after finishing fourth in the 50 freestyle and fifth in the 100 freestyle at state last year. Freshmen Jack Haeffner and Zach Kozak are expected to contribute.
Girls returning letterwinners: Kyana Hubbard, jr.; Lilly Uhlmann, sr.; Mychaela Cook, jr.; Annaliese Kohrell, sr.; Tarin Vocasek, so.; Paige Hoff, jr.; Kali Burnham, jr.; Macy Clare Mertes, so.; Megan Haeffner, so.; Natalie Robbins, so.
Girls outlook: Led by seniors Kohrell and Uhlmann, the Rockets return a lot of experience.
Coach: Mike Witt.
2018 state finishes: Boys, 14th; girls, 3rd.
Boys returning state qualifiers: Jordan Coffey, sr.; Ethan Newland, jr.; Crispin Corpuz, jr.; Alex Becker, so.; Lucas Welsh, so.; Logan Kempf, jr.; Braden Kowalski, jr.
Boys outlook: Pius X must replace several seniors from last year's team, but Coffey returns after a solid junior season, and Kowalski is the returning state diving champion.
Girls returning state qualifiers: Kara Owens, jr.; Katie Stonehocker, jr.; Abigail Mitchell, sr.; Anna Coffey, so.; Olivia Theil, jr.; Charlotte Welsh, sr.; Ava Heasty, so.
Girls outlook: The Thunderbolts must find ways to replace the points produced by five-time state champion Caroline Theil. Several swimmers return, including Stonehocker, last season's 100 breaststroke state champion.
Coach: Brett Ruoff.
2018 state finishes: Boys, NA; girls, 12th.
Boys returning letterwinners: Will Dirrim, sr.; Brett Foster, sr.; Aaron Fuson, jr.; Nathan Hirt, so.; Brady Koolen, so.; Timur Kounikeev, sr.; Cooper McClure, so.; Adam Rustermier, so.; Walter Turner, sr.
Boys outlook: The Knights will rely heavily on a large sophomore class.
Girls returning letterwinners: Sydney Allison, jr.; Baylie Brewer, sr.; Sarah Frances Brown, so.; Megan Calhoun, sr.; Kennedy Carlson, sr.; Aubrey Erickson, sr.; Abby Ertz, jr.; Maggy Mantonya, sr.; Anna Schmid, so.; Alexa Schroeder, jr.; Megan Thompson, so.; Nola Woods, so.; Averie Frye, sr.
Girls outlook: In addition to a large number of returning letterwinners, the Knights have several freshmen that could step in and contribute. Frye is among the Knights' top returning swimmers.
Coach: Leigh Ann Fetter-Witt.
2018 state finishes: Boys, 12th; girls, 1st.
Boys returning letterwinners: Zac Christianson, jr.; Chas Nolte, sr.; Ethan Reida, so.; Vincent Roux, sr.
Boys outlook: Nolte is one of the state's top breaststrokers, and the Silver Hawks expect to get immediate contributions from freshmen Tommy Palmer, Kael Mlinek and Michael Fraley.
Girls returning letterwinners: Edyn Alstrom, jr.; Anna Heinrich, sr.; Berkeley Livingston, sr.; Lanyon Mlinek, so.; Reanne Reida, jr.; Marti Walstad, jr.
Girls outlook: The three-time defending state champion Silver Hawks will be led by Heinrich and Livingston. Each won state titles last season. Walstad was part of two gold-medal relay teams last season, and Mlinek emerged as one of the state's top young swimmers.