**Valentin A. Stonik <sup>1</sup> and Inna V. Stonik 2,\***


Academic Editor: Derek J. McPhee Received: 16 June 2020; Accepted: 1 July 2020; Published: 3 July 2020

**Abstract:** This review considers the results of recent studies on marine excitatory amino acids, including kainic acid, domoic acid, dysiherbaine, and neodysiherbaine A, known as potent agonists of one of subtypes of glutamate receptors, the so-called kainate receptors. Novel information, particularly concerning biosynthesis, environmental roles, biological action, and syntheses of these marine metabolites, obtained mainly in last 10–15 years, is summarized. The goal of the review was not only to discuss recently obtained data, but also to provide a brief introduction to the field of marine excitatory amino acid research.

**Keywords:** kainic acid; domoic acid; dysiherbaine; neodysiherbaine A
