Hydrophyte and Zostera marina

Hydrophyte noun - A plant that grows partly or wholly in water whether rooted in the mud, as a lotus, or floating without anchorage, as the water hyacinth.

Zostera marina and hydrophyte are semantically related. In some cases you can replace phrase "Zostera marina" with "Hydrophyte", this terms are similar.

Zostera marina noun - Submerged marine plant with very long narrow leaves found in abundance along North Atlantic coasts.

Hydrophyte and Zostera marina are semantically related. You can use "Hydrophyte" instead a noun phrase "Zostera marina".