Table 1.

Preliminary phytochemical screening of different extracts of P. tetrastromatica and G. tenuistipitata.

Seaweed species	Extracts	Saponin	Terpenoid	Cardiac glycoside	Phlobatannin	Phenolic	Flavonoid
P. tetrastromatica	Methanol	$+$	$+$	$+$	$+$	$+$	$+$
	Ethanol	$+$	$-$	$+$	$-$	$+$	$+$
	Water	$+$	$-$	$-$	$+$	$+$	$+$
G. tenuistipitata	Methanol	$+$	$+$	$+$	$+$	$+$	$+$
	Ethanol	$-$	$+$	$-$	$+$	$+$	$+$
	Water	$+$	$-$	$+$	$+$	$+$	$+$

“+” constituent's existence, “−” constituent's non-existence.