This is a not a huge museum but is worth a stop by with the kids every now and then. There's a shark tank where you can interact with and pet the sharks and other sea life, a 1,500 gallon tidepool tank and various other displays such as an octopus, moray eel, jellyfish, etc. There's also an area of where they dredge up sand and sea life from below and let you sift through it, looking for interesting things under easy to use microscopes.
Make a day of it in Santa Barbara, have lunch, stop by the carousel at Chase Palm Park, ride bikes along the beach, shop and eat on State Street, etc.
The Sea Center is located at 211 Stearns Wharf in Santa Barbara and is open daily between 10:00 AM to 5:00 PM and closed on Thanksgiving Day, Christmas Eve (at Noon), Christmas Day, and New Year's Day. As of April 2017, admission is $8.50 for adults, $7.50 for seniors (65+) and teens (13-17) and $6 for children (2-12). Or purchase a family membership at the Santa Barbara Museum of Natural History and get in FREE anytime you want to both museums!
For more info visit www.sbnature.org/seacenter or call 805.962.2526.