up to 50% off across the site & free shipping with promo code: freeship - shop deals

Blue Leg Hermit Crab
$0.55 save 20%
Margarita Snail
$0.79 save 20%
Scarlet Skunk Cleaner
More options available
$22.99 to $24.99
$18.39 to $19.99 save up to 20%
Red Leg Hermit Crab
$0.87 save 20%
Nassarius Snail
$0.63 save 20%
Arrow Crab
$6.39 save 20%
Feather Duster
$9.59 save 20%
Nerite Snail
$1.51 save 20%
Chocolate Chip Starfish
$8.79 save 20%
Cerith Snail
$0.79 save 20%
Assorted Sea Hare
$14.39 save 20%
Neon Blue Stripe Hermit Crab
$5.59 save 20%
Mini Carpet Anemone
$19.19 save 20%
Harlequin Shrimp
$26.39 save 20%
Camel Shrimp
$4.55 save 20%
Purple Lobster
More options available
$18.99 to $28.99
$15.19 to $23.19 save up to 20%
Blue Spiny Lobster
More options available
$18.99 to $37.99
$15.19 to $30.39 save up to 20%
Peppermint Shrimp
$4.79 save 20%
Citrus Goby
$12.79 save 20%
Long Spine Urchin
$15.19 save 20%
Assorted Carpet Anemone
$51.99 save 20%
Pencil Urchin
$7.99 save 20%
Blue Linckia Starfish
$12.79 save 20%
Emerald Crab
$4.23 save 20%

Saltwater Fish: Live Saltwater & Marine Aquarium Fish

Shop at Petco for the marine inverts that will add life and beauty to any aquarium. With their vibrant and radiant colors, these species of saltwater snails, shrimp, crabs, and other marine life are a breathtaking addition to your home. No matter how experienced you are at maintaining an aquatic tank, Petco has the tools and tips you need to dive deep into the undersea world of marine inverts.

While freshwater fans certainly have choices about what kinds of life to populate their tank, the amount of options available for saltwater or marine inverts enthusiasts can seem almost as vast as an ocean itself. Their stunning splashes of color also make them a popular choice among aquatic pet parents looking for something to enhance their household. These flourishes come with a price though, as many species of marine inverts – including saltwater shrimp, crabs, and others – are less adaptive and more demanding of water temperature and habitat than their freshwater counterparts. Since they are generally not raised in captivity, some species can also take a little time to get used to eating man-made aquarium foods, and have to be carefully monitored until they adjust to their new diet.

While it may seem like caring for marine inverts is best left to the more experienced, there are plenty of species that are a great match for beginners looking to get their feet wet. Saltwater snails may not be the most high-energy tenant in your aquatic tank, but they are easy to care for and feed on unwanted algae that can crop up. Many types of intensely colored saltwater crabs are algae eaters who also aerate the sand in your aquarium while scavenging for food. Find the right marine inverts to add to your tank at Petco.