Heartless Wonders 7 Unique Animals Without Hearts

Starfish (Asteroidea)

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Coral (Cnidaria)

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Brittle Star (Ophuroids)

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Sea Urchin (Echinoidea)

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Flatworm (Platyhelminthes)

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Sea Lilies (Crinoidea)

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Sea Anemone (Actinaria)

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Heartless Wonders 7 Unique Animals Without Hearts

Starfish (Asteroidea)

The starfish lacks a heart because it circulates seawater instead of pumping blood, which makes a heart unnecessary.

Coral (Cnidaria)

Similar to starfish, corals do not circulate blood but instead circulate fluid, eliminating the need for a heart.

Brittle Star (Ophuroids)

The brittle star, like others on our list, uses a water-vascular system instead of a typical heart and cardiovascular system.

Sea Urchin (Echinoidea)

The sea urchin inhabits oceans worldwide, residing on the seabed and characterized by its spiny shell.

Flatworm (Platyhelminthes)

Flatworms lack respiratory and circulatory systems, utilizing their flat structure to facilitate these functions.

Sea Lilies (Crinoidea)

In their aquatic habitat, they rely on a water vascular system for water circulation and waste removal.

Sea Anemone (Actinaria)

Like every other creature on our list, the sea anemone lacks a heart because it doesn’t require one for survival.