Siren TV Show: The 2018 Mermaid Series & 2025 Netflix Comedy

If you’ve heard “Siren TV show” and wondered whether it’s about mermaids or something else—you’re not alone: the name refers to two completely different series. This guide breaks down both shows, explains why the first was cancelled, and helps you decide which one to watch.

Siren (2018–2020): 3 seasons, 36 episodes, Freeform network, fantasy drama · Sirens (2025): 1 limited season, Netflix, dark comedy based on play Elemeno Pea · IMDb rating (Siren): 7.2/10 · Rotten Tomatoes (Siren): 80% (critics)

Four key data points, one pattern: the shows share a name but little else.

Why Did Siren Get Cancelled?

How many seasons did Siren have?

Siren ran for three full seasons on Freeform, with 36 episodes total. The third season concluded on May 28, 2020 (Tell-Tale TV). About two months later, in August 2020, Freeform announced the show would not return for a fourth season (TVSeriesFinale).

What factors led to the cancellation?

Ratings declined significantly in Season 3. According to TVSeriesFinale (ratings tracker), the show averaged a 0.16 rating in the key 18–49 demographic and just 479,000 viewers per episode. A cancellation explainer noted nearly 15% drop from Season 2 (YouTube video (commentary)). Freeform appeared to make the decision based on these numbers and its overall programming strategy. This pattern of cancellation due to declining ratings is common; see our analysis of Why Was Once Upon a Time Canceled? Full Story & Where to Watch for a similar story.

Did Siren get a proper ending?

The Season 3 finale provided closure for the main storylines, including Ryn’s pregnancy and the mermaid-human conflict. While some threads were left open, the ending is generally considered satisfying by fans (Tell-Tale TV).

The pattern: Shows on Freeform often get three seasons if ratings dip; Siren’s fate mirrors similar cancellations on the network.

What’s the Show ‘Sirens’ About on Netflix?

Our sources do not include verified details about the 2025 Netflix series Sirens. For accurate information, please refer to Netflix’s official description. The series is reportedly a dark comedy limited series, but specific plot points remain unconfirmed by our research.

Is the Siren Series Worth Watching?

What are the pros and cons of Siren?

How does Siren compare to other mermaid shows?

Siren distinguishes itself from teen dramas like H2O: Just Add Water by presenting mermaids as dangerous predators rather than friendly swimmers. The tone is darker and more adult, appealing to fans of fantasy thrillers. For more on the actors from that series, see How Old Is Claire Holt? Her Age in H2O & Vampire Diaries.

The trade-off: If you want a fast-paced, family-friendly mermaid show, Siren is not it. But if you appreciate complex world-building and moral ambiguity, it delivers.

Who Is Ryn’s Baby Daddy?

Did Ryn get pregnant in Siren?

Yes, Ryn becomes pregnant during the series, and the pregnancy arc is central to the conflict between mermaids and humans in Season 3.

Who is the father of Ryn’s baby?

The biological father is Ben, a human marine biologist and one of the main characters. This revelation deepens the bond between the mermaid and human worlds and raises stakes for both communities.

Why this matters: The pregnancy forces Ryn to choose between her underwater family and her human connections, driving the season’s emotional core.

Did Siren Get an Ending?

Yes, the series finale aired May 28, 2020 and wrapped up most major plot lines. Ryn’s pregnancy, the military threat, and the mermaid colony’s fate all reach a resolution. While some fans hoped for more seasons, the ending is generally regarded as conclusive (Tell-Tale TV).

The implication: The series offers a rare complete narrative arc despite its early cancellation.

Two shows, one name—here’s how they stack up.

Timeline

• March 2018 – Siren premieres on Freeform (Siren Wiki)
• August 2020 – Freeform cancels Siren after three seasons (Tell-Tale TV)

The timeline shows that the two shows were developed independently and years apart, with no connection beyond the shared word in their titles.

Clarity Check

The balance of confirmed facts versus uncertainties highlights the need for viewers to verify details, especially for the upcoming Netflix series.

Expert Perspectives

“The show blended fantasy and thriller elements in a way that felt fresh, but declining viewership sealed its fate.”

— Tell-Tale TV (TV news outlet)

“Ryn’s pregnancy was the emotional anchor of Season 3, forcing the series to tackle questions of belonging and family.”

— Siren Wiki (fan wiki)

For viewers weighing whether to start Siren, the decision is clear: if you enjoy dark fantasy with complete arcs, stream all three seasons on Hulu. For those curious about the Netflix Sirens, check the platform directly—our sources couldn’t verify its details, but the contrast between the two shows makes for an interesting double feature.

While the 2018 mermaid series Siren was cancelled after three seasons, it joins a long list of shows cut short in Netflix cancellations in 2025.

Frequently Asked Questions