take an extra 10% off already low prices with promo code: extra10 - shop deals



Blue Leg Hermit Crab
$0.69
$0.59 save 14%
Margarita Snail
$0.99
$0.89 save 10%
Scarlet Skunk Cleaner Shrimp
More options available
$22.99 to $24.99
$19.19 to $20.89 save up to 17%
Red Leg Hermit Crab
$1.09
$0.99 save 9%
Nassarius Snail
$0.79
$0.69 save 13%
Arrow Crab

$7.99
Feather Duster
$11.99
$10.09 save 16%
Nerite Snail
$1.89
$1.59 save 16%
Chocolate Chip Starfish
$10.99
$9.19 save 16%
Cerith Snail
$0.99
$0.89 save 10%
Assorted Sea Hare
$17.99
$15.09 save 16%
Neon Blue Stripe Hermit Crab
$6.99
$5.59 save 20%
Mini Carpet Anemone

$23.99
Harlequin Shrimp
$32.99
$27.59 save 16%
Camel Shrimp
$5.69
$4.79 save 16%
Purple Lobster
More options available
$18.99 to $28.99
$15.89 to $24.19 save up to 17%
Blue Spiny Lobster
More options available
$18.99 to $37.99
$15.89 to $30.89 save up to 19%
Peppermint Shrimp
$5.99
$5.19 save 13%
Citrus Goby
$15.99
$12.79 save 20%
Long Spine Urchin
$18.99
$15.89 save 16%
Assorted Carpet Anemone
$64.99
$54.19 save 17%
Pencil Urchin

$9.99
Blue Linckia Starfish
$15.99
$13.39 save 16%
Emerald Crab
$5.29
$4.29 save 19%

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.