Cetorhinus maximus and Mackerel shark

Cetorhinus maximus noun - Large harmless plankton-eating northern shark; often swims slowly or floats at the sea surface.

Mackerel shark and Cetorhinus maximus are semantically related. In some cases you can use "Mackerel shark" instead a noun phrase "Cetorhinus maximus".

Mackerel shark noun - Fierce pelagic and oceanic sharks.

Cetorhinus maximus and mackerel shark are semantically related. Sometimes you can replace phrase "Cetorhinus maximus" with "Mackerel shark", this phrases are similar.