A squid has three hearts.

Quick Scoop: How Many Hearts Does a Squid Have?

Think of a squid’s circulatory system as a tiny built‑in team of pumps working together to keep this fast-swimming predator energized.

The Three Hearts, Explained

  • Two branchial hearts
    • Located at the base of each gill.
* Pump deoxygenated blood to the gills so it can pick up oxygen from the water.
  • One systemic heart
    • Larger, more muscular central heart.
* Receives oxygenated blood from the gills and pumps it to the rest of the body (muscles, organs, tentacles).

So the short version:

  • Squid hearts = 3 total
  • Job split = 2 for gills, 1 for the whole body

Why So Many Hearts?

Squids are active, jet‑propelled hunters, which means they burn a lot of energy and need efficient oxygen delivery.

  • The two branchial hearts boost blood pressure through the gills, helping oxygen loading.
  • The systemic heart then sends that oxygen-rich blood powerfully through the body so the squid can dart, chase, and escape quickly.

A simple way to picture it:

The branchial hearts are like two local pump stations at the “lungs,” and the systemic heart is the main city pump sending blood everywhere else.

Fun Extra: What If One Heart Fails?

  • If a branchial heart stops: that gill’s oxygen supply drops a lot, so the squid gets less oxygen overall.
  • If the systemic heart fails: circulation to the body collapses and survival is very unlikely.

TL;DR: A squid has three hearts—two branchial hearts for the gills and one systemic heart for the rest of the body—so it can stay fast, agile, and oxygen‑powered in the ocean.

Information gathered from public forums or data available on the internet and portrayed here.