Incredible animals with multiple hearts

Octopus

[{"selector":"#anim-c66a9ed7-d155-4242-857c-e4e3dbc522bb [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-56.85730005226599%, 0, 0) translate(-25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-a44b3883-c0b3-443d-abba-364e849feeb8","keyframes":{"transform":["translate3d(-124.00001%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-7c80b48b-a26f-4bff-a39a-a7083299b5a4","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-7c96712d-ad11-4062-afe1-872d6a75bb58","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}]

Octopuses have three hearts to pump blood through their gills.

[{"selector":"#anim-7ca16fde-8719-4c75-bb23-9d656fd36e1d [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-56.85730005226599%, 0, 0) translate(-25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-603931b3-7946-4d13-989a-f66c1685e450","keyframes":{"transform":["translate3d(-115.18988%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-48cb764c-3032-4baa-86e2-1ad670aa8589","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-18b3404b-d478-4aea-988a-5f3417bc28fb","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}]

Squid

[{"selector":"#anim-d697e000-08d4-485a-8be3-0adbf4e94dfa [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-18.698291060971336%, 0, 0) translate(-25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-6a5059ae-da94-4e2c-8084-b5a5e57f94dd","keyframes":{"transform":["translate3d(-124.00001%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-83dc483f-0192-481a-b801-153eab34db0a","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-5fd57c9c-7c34-42c7-bee9-679a2833b64e","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}]

Giant and colossal squids are the largest animals with multiple hearts.

[{"selector":"#anim-04c00fbf-1996-498d-87e8-693c67da808c [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-18.698291060971336%, 0, 0) translate(-25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-280ab7bf-ccf1-4abf-82ef-80c8ac8627c4","keyframes":{"transform":["translate3d(-117.32027%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-03310f67-da3d-40b9-963d-292762839716","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-7fe40606-b93f-422d-a07c-6ae8e7f9bd0c","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}]

Earthworms

[{"selector":"#anim-c6347077-45d1-42c7-b357-5745501fc93f [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-39.68750001806166%, 0, 0) translate(-25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-aeba561d-c645-43df-b244-b49b52df0201","keyframes":{"transform":["translate3d(-124.00001%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-0b444aa4-33ac-4a2a-8ade-0f719eb10389","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-2d7a70a1-f21e-4d11-a2ed-4aaaccadeda3","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}]

Earthworms are common decomposers with five hearts, which are primitive organs that can be found everywhere.

[{"selector":"#anim-6303bc1f-5557-4e8b-b333-210b862cbf67 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-39.68750001806166%, 0, 0) translate(-25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-676bfb6c-d687-4a67-b440-f8c64416fbfe","keyframes":{"transform":["translate3d(-115.18988%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-5c4ab792-1475-4053-8404-bd9943cbc330","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-fa6a8a3d-61ad-486a-9b78-dc1b7922d65c","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}]

Hagfish

[{"selector":"#anim-c92342b4-71af-4190-bdff-8f185cd5aa55 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-28.90624987200394%, 0, 0) translate(-25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-5289ece2-b299-42fe-a184-c92acccc6a47","keyframes":{"transform":["translate3d(-124.00001%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-8225a0d1-ae85-444b-bb2f-d88f1334e0fb","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-0f3d11e9-4683-4666-ad33-6fa18b40edd3","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}]

Hagfish have four hearts, one for the main circulatory organ and three for pumping power. They live in oxygen-poor water, allowing them to pump for up to 36 hours without oxygen.

[{"selector":"#anim-d2743dae-6d63-4475-95d2-46a098ed6499 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-28.90624987200394%, 0, 0) translate(-25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-b9744a59-0ca9-48b7-9b45-179428a3230b","keyframes":{"transform":["translate3d(-115.18988%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-2e58c310-3247-4eae-9e3d-a95f12799228","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-61917711-d0a4-4e0f-bc0f-79fc18163251","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}]

Cuttlefish

[{"selector":"#anim-98814c66-86eb-4bd0-9e1c-baaca6e00e6f [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-9.218749631584686%, 0, 0) translate(-25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] [{"selector":"#anim-f9a97d8c-af92-46ee-ad8c-c27d95d6a9f4","keyframes":{"transform":["translate3d(-124.00001%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-d9d37487-0eb8-4d21-9936-51e6d62c4b75","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-7a217d04-4389-4068-8966-062f7636267b","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}]

Cuttlefish are considered the most intelligent of all invertebrates, with the largest species being native to Australia.

[{"selector":"#anim-a359f13e-fed6-488c-9e01-7debbd7e7aa7","keyframes":{"transform":["translate3d(-115.18988%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-8e53fb6e-eb78-4b7e-8491-b16d388c4f14","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-0cc50002-3651-4d71-bd54-76107d78a8bb","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] [{"selector":"#anim-8bf97fc0-9c91-4af7-9efd-4ed7fc2348e7 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-9.218749631584686%, 0, 0) translate(-25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}]